CVE-2023-3817
published 2023-07-31CVE-2023-3817: Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_check(), DH_check_ex()…
PriorityP428medium5.3CVSS 3.1
AVNACLPRNUINSUCNINAL
EPSS
2.58%
83.6th percentile
Issue summary: Checking excessively long DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_check(), DH_check_ex()
or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long
delays. Where the key or parameters that are being checked have been obtained
from an untrusted source this may lead to a Denial of Service.
The function DH_check() performs various checks on DH parameters. After fixing
CVE-2023-3446 it was discovered that a large q parameter value can also trigger
an overly long computation during some of these checks. A correct q value,
if present, cannot be larger than the modulus p parameter, thus it is
unnecessary to perform these checks if q is larger than p.
An application that calls DH_check() and supplies a key or parameters obtained
from an untrusted source could be vulnerable to a Denial of Service attack.
The function DH_check() is itself called by a number of other OpenSSL functions.
An application calling any of those other functions may similarly be affected.
The other functions affected by this are DH_check_ex() and
EVP_PKEY_param_check().
Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications
when using the "-check" option.
The OpenSSL SSL/TLS implementation is not affected by this issue.
The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.
Affected
119 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | openssl | < openssl 3.0.13-1~deb12u1 (bookworm) | openssl 3.0.13-1~deb12u1 (bookworm) |
| debian | openssl | < openssl 3.0.10-1~deb12u1 (bookworm) | openssl 3.0.10-1~deb12u1 (bookworm) |
| msrc | azl3_edk2_20230301gitf80f052277c8-37_on_azure_linux_3.0 | — | — |
| msrc | azl3_kata-containers-cc_0.6.1-4_on_azure_linux_3.0 | — | — |
| msrc | azl3_qemu_8.2.0-16_on_azure_linux_3.0 | — | — |
| msrc | azl3_rust_1.68.2-5_on_azure_linux_3.0 | — | — |
| msrc | azl3_rust_1.75.0-14_on_azure_linux_3.0 | — | — |
| msrc | azl3_rust_1.86.0-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_edk2_20230301gitf80f052277c8-37_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_hvloader_1.0.1-11_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_hvloader_1.0.1-9_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_openssl_1.1.1k-26_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_qemu_6.2.0-24_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_rust_1.68.2-5_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| openssl | openssl | — | — |
| openssl | openssl | — | — |
| openssl | openssl | — | — |
| openssl | openssl | — | — |
| openssl | openssl | — | — |
| openssl | openssl | — | — |
| openssl | openssl | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
osv7.4HIGH
vendor_ubuntu7.4HIGH
vendor_debian5.3MEDIUM
vendor_msrc5.3MEDIUM
vendor_oracle5.3MEDIUM
vendor_redhat5.3MEDIUM
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Ubuntu
EDK II regression
vendor_ubuntu·2025-11-28·CVSS 5.8
CVE-2023-45236 [MEDIUM] EDK II regression
Title: EDK II regression
Summary: USN-7894-1 introduced a regression in EDK II
USN-7894-1 fixed vulnerabilities in EDK II. The update introduced a
regression in the UEFI network boot. This update reverts the corresponding
fixes for CVE-2023-45236 and CVE-2023-45237 pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS
Ubuntu
EDK II vulnerabilities
vendor_ubuntu·2025-11-26·CVSS 7.4
CVE-2023-45236 [HIGH] EDK II vulnerabilities
Title: EDK II vulnerabilities
Summary: Several security issues were fixed in EDK II.
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-1298)
It was discovered that the EDK II PE/COFF loader incorrectly handled
certain memory operations. An attacker could possibly use this issue to
cause a denial of service, obtain sensitive information, or execute
arbitrary code. This issue o
CISA ICS
Siemens SINEC OS
cisa_ics·2025-08-14
Siemens SINEC OS
ICS Advisory
##
Siemens SINEC OS
Release DateAugust 14, 2025
Alert CodeICSA-25-226-15
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3.1 9.1
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: RUGGEDCOM, SCALANCE
- Vulnerabilities: NULL Pointer Dereference, Use After Free, Unchecked Input for Loop Condition, Out-of-bounds Write, Ou
CISA ICS
Siemens SIDIS Prime
cisa_ics·2025-04-10
Siemens SIDIS Prime
ICS Advisory
##
Siemens SIDIS Prime
Release DateApril 10, 2025
Alert CodeICSA-25-100-02
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v4 9.1
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIDIS Prime
- Vulnerabilities: Race Condition Enabling Link Following, Improper Validation of Integrity Check Value, Unchecked Input for Loo
CISA ICS
Siemens SCALANCE W700
cisa_ics·2025-02-13
Siemens SCALANCE W700
ICS Advisory
##
Siemens SCALANCE W700
Release DateFebruary 13, 2025
Alert CodeICSA-25-044-09
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SCALANCE W700
- Vulnerabilities: Double Free, Improper Restriction of Communication Channel to Intended Endpoints, Improper Resource Sh
CISA ICS
Siemens SINEC NMS
cisa_ics·2024-11-14
Siemens SINEC NMS
ICS Advisory
##
Siemens SINEC NMS
Release DateNovember 14, 2024
Alert CodeICSA-24-319-04
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v4 8.3
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SINEC NMS
- Vulnerabilities: Improper Input Validation, Improper Check for Unusual or Exceptional Conditions, Out-of-bounds Write, Uncontro
CISA ICS
Siemens SINEC INS
cisa_ics·2024-11-14
Siemens SINEC INS
ICS Advisory
##
Siemens SINEC INS
Release DateNovember 14, 2024
Alert CodeICSA-24-319-08
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.9
- ATTENTION: Exploitable remotely/low attack complexity/public exploits are available/known public exploitation
- Vendor: Siemens
- Equipment: SINEC INS
- Vulnerabilities: Improper Authentication, Out-of-bounds Write, Ineffici
Palo Alto
PAN-SA-2024-0014 Informational Bulletin: Impact of OSS CVEs in Cortex XDR Agent
vendor_paloalto·2024-11-07·CVSS 6.8
CVE-2014-0195 [MEDIUM] PAN-SA-2024-0014 Informational Bulletin: Impact of OSS CVEs in Cortex XDR Agent
PAN-SA-2024-0014 Informational Bulletin: Impact of OSS CVEs in Cortex XDR Agent
The Palo Alto Networks Product Security Assurance team has evaluated the following open source software (OSS) CVEs as they relate to Cortex XDR Agent. While Cortex XDR Agent may include the
CVEs: CVE-2014-0195, CVE-2014-0224, CVE-2014-3509, CVE-2014-3512, CVE-2014-3513, CVE-2014-3567, CVE-2015-0209, CVE-2015-0292, CVE-2015-1789, CVE-2015-1791, CVE-2015-1793, CVE-2015-3194, CVE-2016-0705, CVE-2016-0797, CVE-2016-0798, CVE-2016-0799, CVE-2016-2105, CVE-2016-2106, CVE-2016-2108, CVE-2016-2109, CVE-2016-2176, CVE-2016-2177, CVE-2016-2179, CVE-2016-2180, CVE-2016-2181, CVE-2016-2182, CVE-2016-2183, CVE-2016-6302, CVE-2016-6303, CVE-2016-6304, CVE-2019-1551, CVE-2019-1552, CVE-2019-1559, CVE-2019-1563, CVE-2020-196
Oracle
Oracle Oracle JD Edwards Risk Matrix: Enterprise Infrastructure SEC (OpenSSL) — CVE-2023-3817
vendor_oracle·2024-07-15·CVSS 5.3
CVE-2023-3817 [MEDIUM] Oracle Oracle JD Edwards Risk Matrix: Enterprise Infrastructure SEC (OpenSSL) — CVE-2023-3817
Oracle Oracle JD Edwards Risk Matrix: Enterprise Infrastructure SEC (OpenSSL) vulnerability
CVE: CVE-2023-3817
CVSS: 5.3
Protocol: HTTPS
Remote exploit: Yes
Affected versions: Network
Advisory: cpujul2024 (JUL 2024)
CISA ICS
Siemens ST7 ScadaConnect
cisa_ics·2024-06-13·CVSS 7.5
[HIGH] Siemens ST7 ScadaConnect
ICS Advisory
##
Siemens ST7 ScadaConnect
Release DateJune 13, 2024
Alert CodeICSA-24-165-04
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 8.2
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: ST7 ScadaConnect
- Vulnerabilities: Integer Overflow or Wraparound, Double Free, Improper Certificate Validation, Inefficient Regular Ex
CISA ICS
Siemens SIMATIC RTLS Locating Manager
cisa_ics·2024-05-16
Siemens SIMATIC RTLS Locating Manager
ICS Advisory
##
Siemens SIMATIC RTLS Locating Manager
Release DateMay 16, 2024
Alert CodeICSA-24-137-07
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v4 10.0
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIMATIC RTLS Locating Manager
- Vulnerabilities: Improper Input Validation, Improper Check for Unusual or Exceptional Conditions, Uncontrolled Resource Consumption, Excessive Iteration, Allocation of Resources Wi
Oracle
Oracle Oracle Analytics Risk Matrix: Installation (OpenSSL) — CVE-2023-3817
vendor_oracle·2024-04-15·CVSS 5.3
CVE-2023-3817 [MEDIUM] Oracle Oracle Analytics Risk Matrix: Installation (OpenSSL) — CVE-2023-3817
Oracle Oracle Analytics Risk Matrix: Installation (OpenSSL) vulnerability
CVE: CVE-2023-3817
CVSS: 5.3
Protocol: TLS
Remote exploit: Yes
Affected versions: Network
Advisory: cpuapr2024 (APR 2024)
CISA ICS
Siemens Telecontrol Server Basic
cisa_ics·2024-04-11
Siemens Telecontrol Server Basic
ICS Advisory
##
Siemens Telecontrol Server Basic
Release DateApril 11, 2024
Alert CodeICSA-24-102-08
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 8.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: Telecontrol Server Basic
- Vulnerabilities: Inadequate Encryption Strength, Double Free, Integer Overflow or Wraparound, External Control of File Name or Path, Path Traversal, Improper Input Validation, Missing Encry
CISA ICS
Siemens SINEC NMS
cisa_ics·2024-04-11·CVSS 5.3
[MEDIUM] Siemens SINEC NMS
ICS Advisory
##
Siemens SINEC NMS
Release DateApril 11, 2024
Alert CodeICSA-24-102-07
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v4 7.2
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SINEC NMS
- Vulnerabilities: Improper Check for Unusual or Exceptional Conditions, Improper Limitation of a Pathname to a Restricted Directory
## 2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an
Ubuntu
OpenSSL vulnerabilities
vendor_ubuntu·2024-03-21·CVSS 5.3
CVE-2023-5678 [MEDIUM] OpenSSL vulnerabilities
Title: OpenSSL vulnerabilities
Summary: Several security issues were fixed in OpenSSL.
It was discovered that checking excessively long DH keys or parameters
may be very slow. A remote attacker could possibly use this issue to
cause OpenSSL to consume resources, resulting in a denial of service.
(CVE-2023-3446)
After the fix for CVE-2023-3446 Bernd Edlinger discovered that a large
q parameter value can also trigger an overly long computation during
some of these checks. A remote attacker could possibly use this issue
to cause OpenSSL to consume resources, resulting in a denial of
service. (CVE-2023-3817)
David Benjamin discovered that generating excessively long X9.42 DH
keys or checking excessively long X9.42 DH keys or parameters may be
very slow. A remote attacker could possibly use
CISA ICS
Siemens SINEC NMS
cisa_ics·2024-02-15
Siemens SINEC NMS
ICS Advisory
##
Siemens SINEC NMS
Release DateFebruary 15, 2024
Alert CodeICSA-24-046-15
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SINEC NMS
- Vulnerabilities: Out-of-bounds Read, Inadequate Encryption Strength, Double Free, Use After Free, NULL Pointer Dereference, Improper Input Validation, Missing Encryption of Sensitive Data, Allocation of Resources Wit
Oracle
Oracle Oracle Fusion Middleware Risk Matrix: SSL Module (OpenSSL) — CVE-2023-3817
vendor_oracle·2024-01-15·CVSS 5.3
CVE-2023-3817 [MEDIUM] Oracle Oracle Fusion Middleware Risk Matrix: SSL Module (OpenSSL) — CVE-2023-3817
Oracle Oracle Fusion Middleware Risk Matrix: SSL Module (OpenSSL) vulnerability
CVE: CVE-2023-3817
CVSS: 5.3
Protocol: TLS
Remote exploit: Yes
Affected versions: Network
Advisory: cpujan2024 (JAN 2024)
CISA ICS
Siemens SIMATIC MV500
cisa_ics·2023-11-16·CVSS 9.8
[CRITICAL] Siemens SIMATIC MV500
ICS Advisory
##
Siemens SIMATIC MV500
Release DateNovember 16, 2023
Alert CodeICSA-23-320-13
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIMATIC MV500
- Vulnerabilities: Classic Buffer Overflow, NULL Pointer Dereference, Improper Authentication, Inefficient Regular Expression Complexity, Excessive Iteration, Out-of-bounds Write
## 2. RISK EVALUATION
Succe
Ubuntu
OpenSSL vulnerabilities
vendor_ubuntu·2023-10-25·CVSS 5.3
CVE-2023-3446 [MEDIUM] OpenSSL vulnerabilities
Title: OpenSSL vulnerabilities
Summary: OpenSSL could be made to consume resources and cause long delays
if it processed certain input.
USN-6435-1 fixed vulnerabilities in OpenSSL. This update
provides the corresponding updates for Ubuntu 20.04 LTS.
Original advisory details:
It was discovered that OpenSSL incorrectly handled excessively large
Diffie-Hellman parameters. An attacker could possibly use this issue
to cause a denial of service. (CVE-2023-3446)
Bernd Edlinger discovered that OpenSSL incorrectly handled excessively
large Diffie-Hellman parameters. An attacker could possibly use this
issue to cause a denial of service. (CVE-2023-3817)
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
Ubuntu
OpenSSL vulnerabilities
vendor_ubuntu·2023-10-24·CVSS 5.3
CVE-2023-5363 [MEDIUM] OpenSSL vulnerabilities
Title: OpenSSL vulnerabilities
Summary: Several security issues were fixed in OpenSSL.
Tony Battersby discovered that OpenSSL incorrectly handled key and
initialization vector (IV) lengths. This could lead to truncation issues
and result in loss of confidentiality for some symmetric cipher modes.
(CVE-2023-5363)
Juerg Wullschleger discovered that OpenSSL incorrectly handled the AES-SIV
cipher. This could lead to empty data entries being ignored, resulting in
certain applications being misled. This issue only affected Ubuntu 22.04
LTS and Ubuntu 23.04. (CVE-2023-2975)
It was discovered that OpenSSL incorrectly handled checking excessively
long DH keys or parameters. A remote attacker could possibly use this issue
to cause OpenSSL to consume resources, leading to a denial of service. Thi
Red Hat
openssl: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow
vendor_redhat·2023-10-24·CVSS 5.3
CVE-2023-5678 [MEDIUM] CWE-325 openssl: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow
openssl: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow
Issue summary: Generating excessively long X9.42 DH keys or checking
excessively long X9.42 DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_generate_key() to
generate an X9.42 DH key may experience long delays. Likewise, applications
that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check()
to check an X9.42 DH key or X9.42 DH parameters may experience long delays.
Where the key or parameters that are being checked have been obtained from
an untrusted source this may lead to a Denial of Service.
While DH_check() performs all the necessary checks (as of CVE-2023-3817),
DH_check_pub_key() doesn't make
Ubuntu
OpenSSL vulnerabilities
vendor_ubuntu·2023-10-18·CVSS 5.3
CVE-2023-3817 [MEDIUM] OpenSSL vulnerabilities
Title: OpenSSL vulnerabilities
Summary: OpenSSL could be made to consume resources and cause long delays
if it processed certain input.
It was discovered that OpenSSL incorrectly handled excessively large
Diffie-Hellman parameters. An attacker could possibly use this issue
to cause a denial of service. (CVE-2023-3446)
Bernd Edlinger discovered that OpenSSL incorrectly handled excessively
large Diffie-Hellman parameters. An attacker could possibly use this
issue to cause a denial of service. (CVE-2023-3817)
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
Oracle
Oracle Oracle MySQL Risk Matrix: Connector/C++ (OpenSSL) — CVE-2023-3817
vendor_oracle·2023-10-15·CVSS 5.3
CVE-2023-3817 [MEDIUM] Oracle Oracle MySQL Risk Matrix: Connector/C++ (OpenSSL) — CVE-2023-3817
Oracle Oracle MySQL Risk Matrix: Connector/C++ (OpenSSL) vulnerability
CVE: CVE-2023-3817
CVSS: 5.3
Protocol: MySQL Protocol
Remote exploit: Yes
Affected versions: Network
Advisory: cpuoct2023 (OCT 2023)
Red Hat
OpenSSL: Excessive time spent checking DH q parameter value
vendor_redhat·2023-07-31·CVSS 5.3
CVE-2023-3817 [MEDIUM] OpenSSL: Excessive time spent checking DH q parameter value
OpenSSL: Excessive time spent checking DH q parameter value
Issue summary: Checking excessively long DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_check(), DH_check_ex()
or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long
delays. Where the key or parameters that are being checked have been obtained
from an untrusted source this may lead to a Denial of Service.
The function DH_check() performs various checks on DH parameters. After fixing
CVE-2023-3446 it was discovered that a large q parameter value can also trigger
an overly long computation during some of these checks. A correct q value,
if present, cannot be larger than the modulus p parameter, thus it is
unnecessary to perform these checks if q is larger tha
Microsoft
Excessive time spent checking DH q parameter value
vendor_msrc·2023-07-11·CVSS 5.3
CVE-2023-3817 [MEDIUM] CWE-834 Excessive time spent checking DH q parameter value
Excessive time spent checking DH q parameter value
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
openssl: openssl
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.
Debian
CVE-2023-5678: openssl - Issue summary: Generating excessively long X9.42 DH keys or checking excessively...
vendor_debian·2023·CVSS 5.3
CVE-2023-5678 [MEDIUM] CVE-2023-5678: openssl - Issue summary: Generating excessively long X9.42 DH keys or checking excessively...
Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_generate_key() to generate an X9.42 DH key may experience long delays. Likewise, applications that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check() to check an X9.42 DH key or X9.42 DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service. While DH_check() performs all the necessary checks (as of CVE-2023-3817), DH_check_pub_key() doesn't make any of these checks, and is therefore vulnerable for excessively large P and Q parameters. Likewise, while DH_generate_key() p
Debian
CVE-2023-3817: openssl - Issue summary: Checking excessively long DH keys or parameters may be very slow....
vendor_debian·2023·CVSS 5.3
CVE-2023-3817 [MEDIUM] CVE-2023-3817: openssl - Issue summary: Checking excessively long DH keys or parameters may be very slow....
Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service. The function DH_check() performs various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter value can also trigger an overly long computation during some of these checks. A correct q value, if present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if q is larger than p. An application that calls DH_check() and supplies a key
OSV
edk2 regression
osv·2025-11-28·CVSS 7.4
CVE-2023-45236 [HIGH] edk2 regression
edk2 regression
USN-7894-1 fixed vulnerabilities in EDK II. The update introduced a
regression in the UEFI network boot. This update reverts the corresponding
fixes for CVE-2023-45236 and CVE-2023-45237 pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-1298)
It was discovered that
OSV
edk2 vulnerabilities
osv·2025-11-26·CVSS 7.4
CVE-2023-45236 [HIGH] edk2 vulnerabilities
edk2 vulnerabilities
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-1298)
It was discovered that the EDK II PE/COFF loader incorrectly handled
certain memory operations. An attacker could possibly use this issue to
cause a denial of service, obtain sensitive information, or execute
arbitrary code. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2024-38
OSV
openssl1.0 vulnerabilities
osv·2024-03-21·CVSS 5.3
CVE-2023-3446 [MEDIUM] openssl1.0 vulnerabilities
openssl1.0 vulnerabilities
It was discovered that checking excessively long DH keys or parameters
may be very slow. A remote attacker could possibly use this issue to
cause OpenSSL to consume resources, resulting in a denial of service.
(CVE-2023-3446)
After the fix for CVE-2023-3446 Bernd Edlinger discovered that a large
q parameter value can also trigger an overly long computation during
some of these checks. A remote attacker could possibly use this issue
to cause OpenSSL to consume resources, resulting in a denial of
service. (CVE-2023-3817)
David Benjamin discovered that generating excessively long X9.42 DH
keys or checking excessively long X9.42 DH keys or parameters may be
very slow. A remote attacker could possibly use this issue to cause
OpenSSL to consume resources, resulting
OSV
CVE-2023-5678: Issue summary: Generating excessively long X9
osv·2023-11-06·CVSS 5.3
CVE-2023-5678 [MEDIUM] CVE-2023-5678: Issue summary: Generating excessively long X9
Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_generate_key() to generate an X9.42 DH key may experience long delays. Likewise, applications that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check() to check an X9.42 DH key or X9.42 DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service. While DH_check() performs all the necessary checks (as of CVE-2023-3817), DH_check_pub_key() doesn't make any of these checks, and is therefore vulnerable for excessively large P and Q parameters. Likewise, while DH_generate_key() p
GHSA
GHSA-2cj7-mg3x-9mhq: Issue summary: Generating excessively long X9
ghsa_unreviewed·2023-11-06·CVSS 5.3
CVE-2023-5678 [MEDIUM] CWE-606 GHSA-2cj7-mg3x-9mhq: Issue summary: Generating excessively long X9
Issue summary: Generating excessively long X9.42 DH keys or checking
excessively long X9.42 DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_generate_key() to
generate an X9.42 DH key may experience long delays. Likewise, applications
that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check()
to check an X9.42 DH key or X9.42 DH parameters may experience long delays.
Where the key or parameters that are being checked have been obtained from
an untrusted source this may lead to a Denial of Service.
While DH_check() performs all the necessary checks (as of CVE-2023-3817),
DH_check_pub_key() doesn't make any of these checks, and is therefore
vulnerable for excessively large P and Q parameters.
Likewise, while DH_generate_key(
OSV
CVE-2023-5678: Issue summary: Generating excessively long X9
osv·2023-11-06·CVSS 5.3
CVE-2023-5678 [MEDIUM] CVE-2023-5678: Issue summary: Generating excessively long X9
Issue summary: Generating excessively long X9.42 DH keys or checking
excessively long X9.42 DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_generate_key() to
generate an X9.42 DH key may experience long delays. Likewise, applications
that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check()
to check an X9.42 DH key or X9.42 DH parameters may experience long delays.
Where the key or parameters that are being checked have been obtained from
an untrusted source this may lead to a Denial of Service.
While DH_check() performs all the necessary checks (as of CVE-2023-3817),
DH_check_pub_key() doesn't make any of these checks, and is therefore
vulnerable for excessively large P and Q parameters.
Likewise, while DH_generate_key(
OSV
openssl vulnerabilities
osv·2023-10-25·CVSS 5.3
CVE-2023-3446 [MEDIUM] openssl vulnerabilities
openssl vulnerabilities
USN-6435-1 fixed vulnerabilities in OpenSSL. This update
provides the corresponding updates for Ubuntu 20.04 LTS.
Original advisory details:
It was discovered that OpenSSL incorrectly handled excessively large
Diffie-Hellman parameters. An attacker could possibly use this issue
to cause a denial of service. (CVE-2023-3446)
Bernd Edlinger discovered that OpenSSL incorrectly handled excessively
large Diffie-Hellman parameters. An attacker could possibly use this
issue to cause a denial of service. (CVE-2023-3817)
OSV
openssl vulnerabilities
osv·2023-10-24·CVSS 5.3
CVE-2023-5363 [MEDIUM] openssl vulnerabilities
openssl vulnerabilities
Tony Battersby discovered that OpenSSL incorrectly handled key and
initialization vector (IV) lengths. This could lead to truncation issues
and result in loss of confidentiality for some symmetric cipher modes.
(CVE-2023-5363)
Juerg Wullschleger discovered that OpenSSL incorrectly handled the AES-SIV
cipher. This could lead to empty data entries being ignored, resulting in
certain applications being misled. This issue only affected Ubuntu 22.04
LTS and Ubuntu 23.04. (CVE-2023-2975)
It was discovered that OpenSSL incorrectly handled checking excessively
long DH keys or parameters. A remote attacker could possibly use this issue
to cause OpenSSL to consume resources, leading to a denial of service. This
issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-20
OSV
openssl vulnerabilities
osv·2023-10-18·CVSS 5.3
CVE-2023-3446 [MEDIUM] openssl vulnerabilities
openssl vulnerabilities
It was discovered that OpenSSL incorrectly handled excessively large
Diffie-Hellman parameters. An attacker could possibly use this issue
to cause a denial of service. (CVE-2023-3446)
Bernd Edlinger discovered that OpenSSL incorrectly handled excessively
large Diffie-Hellman parameters. An attacker could possibly use this
issue to cause a denial of service. (CVE-2023-3817)
OSV
CVE-2023-3817: Issue summary: Checking excessively long DH keys or parameters may be very slow
osv·2023-07-31·CVSS 5.3
CVE-2023-3817 [MEDIUM] CVE-2023-3817: Issue summary: Checking excessively long DH keys or parameters may be very slow
Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service. The function DH_check() performs various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter value can also trigger an overly long computation during some of these checks. A correct q value, if present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if q is larger than p. An application that calls DH_check() and supplies a key
GHSA
GHSA-c945-cqj5-wfv6: Issue summary: Checking excessively long DH keys or parameters may be very slow
ghsa_unreviewed·2023-07-31·CVSS 5.3
CVE-2023-3817 [MEDIUM] CWE-606 GHSA-c945-cqj5-wfv6: Issue summary: Checking excessively long DH keys or parameters may be very slow
Issue summary: Checking excessively long DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_check(), DH_check_ex()
or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long
delays. Where the key or parameters that are being checked have been obtained
from an untrusted source this may lead to a Denial of Service.
The function DH_check() performs various checks on DH parameters. After fixing
CVE-2023-3446 it was discovered that a large q parameter value can also trigger
an overly long computation during some of these checks. A correct q value,
if present, cannot be larger than the modulus p parameter, thus it is
unnecessary to perform these checks if q is larger than p.
An application that calls DH_check() and supplies a k
OSV
CVE-2023-3817: Issue summary: Checking excessively long DH keys or parameters may be very slow
osv·2023-07-31·CVSS 5.3
CVE-2023-3817 [MEDIUM] CVE-2023-3817: Issue summary: Checking excessively long DH keys or parameters may be very slow
Issue summary: Checking excessively long DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_check(), DH_check_ex()
or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long
delays. Where the key or parameters that are being checked have been obtained
from an untrusted source this may lead to a Denial of Service.
The function DH_check() performs various checks on DH parameters. After fixing
CVE-2023-3446 it was discovered that a large q parameter value can also trigger
an overly long computation during some of these checks. A correct q value,
if present, cannot be larger than the modulus p parameter, thus it is
unnecessary to perform these checks if q is larger than p.
An application that calls DH_check() and supplies a k
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7fhttps://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5https://www.openssl.org/news/secadv/20230731.txthttp://seclists.org/fulldisclosure/2023/Jul/43http://www.openwall.com/lists/oss-security/2023/07/31/1http://www.openwall.com/lists/oss-security/2023/09/22/11http://www.openwall.com/lists/oss-security/2023/09/22/9http://www.openwall.com/lists/oss-security/2023/11/06/2https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a1eb62c29db6cb5eec707f9338aee00f44e26f5https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=869ad69aadd985c7b8ca6f4e5dd0eb274c9f3644https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9002fd07327a91f35ba6c1307e71fa6fd4409b7fhttps://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=91ddeba0f2269b017dc06c46c993a788974b1aa5https://lists.debian.org/debian-lts-announce/2023/08/msg00019.htmlhttps://security.gentoo.org/glsa/202402-08https://security.netapp.com/advisory/ntap-20230818-0014/https://security.netapp.com/advisory/ntap-20231027-0008/https://security.netapp.com/advisory/ntap-20240621-0006/https://www.openssl.org/news/secadv/20230731.txt
2023-07-31
Published