CVE-2020-36226
published 2021-01-26CVE-2020-36226: A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of…
PriorityP340high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
4.23%
91.0th percentile
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.
Affected
35 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | — | — |
| apple | mac_os_x | >= 10.14.0 < 10.14.6 | 10.14.6 |
| apple | macos | >= 11.1 < 11.4 | 11.4 |
| apple | macos_big_sur | — | — |
| apple | security_update_2021-003_catalina | — | — |
| apple | security_update_2021-004_mojave | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | openldap | < openldap 2.4.57+dfsg-1 (bookworm) | openldap 2.4.57+dfsg-1 (bookworm) |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu7.5HIGH
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Ubuntu
OpenLDAP vulnerabilities
vendor_ubuntu·2025-08-17·CVSS 7.5
CVE-2020-36221 [HIGH] OpenLDAP vulnerabilities
Title: OpenLDAP vulnerabilities
Summary: Several security issues were fixed in OpenLDAP.
It was discovered that OpenLDAP incorrectly handled Certificate Exact
Assertion processing. A remote attacker could possibly use this issue to
cause OpenLDAP to crash, resulting in a denial of service. (CVE-2020-36221)
It was discovered that OpenLDAP incorrectly handled saslAuthzTo processing.
A remote attacker could use this issue to cause OpenLDAP to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2020-36222, CVE-2020-36224, CVE-2020-36225, CVE-2020-36226)
It was discovered that OpenLDAP incorrectly handled Return Filter control
handling. A remote attacker could use this issue to cause OpenLDAP to
crash, resulting in a denial of service, or possibly execute arbit
CISA ICS
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
cisa_ics·2023-12-14
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
ICS Advisory
##
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
Release DateDecember 14, 2023
Alert CodeICSA-23-348-10
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 S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
- Vulnerabilities: Improper Restriction of XML External Entity Reference, Time-of-check Time-of-use (TOCTOU) Race Condition, Command Injection, Miss
Apple
CVE-2020-36226: Security Update 2021-003 Catalina
vendor_apple·2021-05-24·CVSS 7.5
CVE-2020-36226 [HIGH] CVE-2020-36226: Security Update 2021-003 Catalina
Apple Security Update: About the security content of Security Update 2021-003 Catalina
Product: Security Update 2021-003 Catalina
CVE: CVE-2020-36226
Component: CVE-2020-36226
Apple
CVE-2020-36226: macOS Big Sur 11.4
vendor_apple·2021-05-24·CVSS 7.5
CVE-2020-36226 [HIGH] CVE-2020-36226: macOS Big Sur 11.4
Apple Security Update: About the security content of macOS Big Sur 11.4
Product: macOS Big Sur
Version: 11.4
CVE: CVE-2020-36226
Component: CVE-2020-36226
Apple
CVE-2020-36226: Security Update 2021-004 Mojave
vendor_apple·2021-05-24·CVSS 7.5
CVE-2020-36226 [HIGH] CVE-2020-36226: Security Update 2021-004 Mojave
Apple Security Update: About the security content of Security Update 2021-004 Mojave
Product: Security Update 2021-004 Mojave
CVE: CVE-2020-36226
Component: CVE-2020-36226
Ubuntu
OpenLDAP vulnerabilities
vendor_ubuntu·2021-02-08·CVSS 7.5
CVE-2020-36223 [HIGH] OpenLDAP vulnerabilities
Title: OpenLDAP vulnerabilities
Summary: Several security issues were fixed in OpenLDAP.
It was discovered that OpenLDAP incorrectly handled Certificate Exact
Assertion processing. A remote attacker could possibly use this issue to
cause OpenLDAP to crash, resulting in a denial of service. (CVE-2020-36221)
It was discovered that OpenLDAP incorrectly handled saslAuthzTo processing.
A remote attacker could use this issue to cause OpenLDAP to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2020-36222, CVE-2020-36224, CVE-2020-36225, CVE-2020-36226)
It was discovered that OpenLDAP incorrectly handled Return Filter control
handling. A remote attacker could use this issue to cause OpenLDAP to
crash, resulting in a denial of service, or possibly execute arbit
Red Hat
openldap: Denial of service via length miscalculation in slap_parse_user
vendor_redhat·2021-01-26·CVSS 7.5
CVE-2020-36226 [HIGH] CWE-130 openldap: Denial of service via length miscalculation in slap_parse_user
openldap: Denial of service via length miscalculation in slap_parse_user
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.
Statement: This flaw does not affect openldap as shipped with Red Hat Enterprise Linux 8 because the slapd server is not shipped. While Red Hat Enterprise Linux 7 does ship the slapd server, this flaw is out of support scope for Red Hat Enterprise Linux 7 and earlier. For more information on support scope, see https://access.redhat.com/support/policy/updates/errata/ .
Package: compat-openldap (Red Hat Enterprise Linux 6) - Out of support scope
Package: openldap (Red Hat Enterprise Linux 6) - Out of support scope
Package: compat-openldap (Red Hat E
Microsoft
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing resulting in denial of service.
vendor_msrc·2021-01-12·CVSS 7.5
CVE-2020-36226 [HIGH] A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing resulting in denial of service.
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing resulting in denial of service.
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: M
Debian
CVE-2020-36226: openldap - A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len misca...
vendor_debian·2020·CVSS 7.5
CVE-2020-36226 [HIGH] CVE-2020-36226: openldap - A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len misca...
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.
Scope: local
bookworm: resolved (fixed in 2.4.57+dfsg-1)
bullseye: resolved (fixed in 2.4.57+dfsg-1)
forky: resolved (fixed in 2.4.57+dfsg-1)
sid: resolved (fixed in 2.4.57+dfsg-1)
trixie: resolved (fixed in 2.4.57+dfsg-1)
OSV
openldap vulnerabilities
osv·2025-08-17·CVSS 7.5
CVE-2020-36221 [HIGH] openldap vulnerabilities
openldap vulnerabilities
It was discovered that OpenLDAP incorrectly handled Certificate Exact
Assertion processing. A remote attacker could possibly use this issue to
cause OpenLDAP to crash, resulting in a denial of service. (CVE-2020-36221)
It was discovered that OpenLDAP incorrectly handled saslAuthzTo processing.
A remote attacker could use this issue to cause OpenLDAP to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2020-36222, CVE-2020-36224, CVE-2020-36225, CVE-2020-36226)
It was discovered that OpenLDAP incorrectly handled Return Filter control
handling. A remote attacker could use this issue to cause OpenLDAP to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2020-36223)
It was discovered that OpenLDAP inco
GHSA
GHSA-23c4-87c4-jw89: A flaw was discovered in OpenLDAP before 2
ghsa_unreviewed·2022-05-24
CVE-2020-36226 [HIGH] GHSA-23c4-87c4-jw89: A flaw was discovered in OpenLDAP before 2
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.
OSV
openldap vulnerabilities
osv·2021-02-08·CVSS 7.5
CVE-2020-36221 [HIGH] openldap vulnerabilities
openldap vulnerabilities
It was discovered that OpenLDAP incorrectly handled Certificate Exact
Assertion processing. A remote attacker could possibly use this issue to
cause OpenLDAP to crash, resulting in a denial of service. (CVE-2020-36221)
It was discovered that OpenLDAP incorrectly handled saslAuthzTo processing.
A remote attacker could use this issue to cause OpenLDAP to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2020-36222, CVE-2020-36224, CVE-2020-36225, CVE-2020-36226)
It was discovered that OpenLDAP incorrectly handled Return Filter control
handling. A remote attacker could use this issue to cause OpenLDAP to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2020-36223)
It was discovered that OpenLDAP inco
OSV
CVE-2020-36226: A flaw was discovered in OpenLDAP before 2
osv·2021-01-26·CVSS 7.5
CVE-2020-36226 [HIGH] CVE-2020-36226: A flaw was discovered in OpenLDAP before 2
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://seclists.org/fulldisclosure/2021/May/64http://seclists.org/fulldisclosure/2021/May/65http://seclists.org/fulldisclosure/2021/May/70https://bugs.openldap.org/show_bug.cgi?id=9413https://git.openldap.org/openldap/openldap/-/commit/554dff1927176579d652f2fe60c90e9abbad4c65https://git.openldap.org/openldap/openldap/-/commit/5a2017d4e61a6ddc4dcb4415028e0d08eb6bca26https://git.openldap.org/openldap/openldap/-/commit/c0b61a9486508e5202aa2e0cfb68c9813731b439https://git.openldap.org/openldap/openldap/-/commit/d169e7958a3e0dc70f59c8374bf8a59833b7bdd8https://git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3Ehttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.debian.org/debian-lts-announce/2021/02/msg00005.htmlhttps://security.netapp.com/advisory/ntap-20210226-0002/https://support.apple.com/kb/HT212529https://support.apple.com/kb/HT212530https://support.apple.com/kb/HT212531https://www.debian.org/security/2021/dsa-4845http://seclists.org/fulldisclosure/2021/May/64http://seclists.org/fulldisclosure/2021/May/65http://seclists.org/fulldisclosure/2021/May/70https://bugs.openldap.org/show_bug.cgi?id=9413https://git.openldap.org/openldap/openldap/-/commit/554dff1927176579d652f2fe60c90e9abbad4c65https://git.openldap.org/openldap/openldap/-/commit/5a2017d4e61a6ddc4dcb4415028e0d08eb6bca26https://git.openldap.org/openldap/openldap/-/commit/c0b61a9486508e5202aa2e0cfb68c9813731b439https://git.openldap.org/openldap/openldap/-/commit/d169e7958a3e0dc70f59c8374bf8a59833b7bdd8https://git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3Ehttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.debian.org/debian-lts-announce/2021/02/msg00005.htmlhttps://security.netapp.com/advisory/ntap-20210226-0002/https://support.apple.com/kb/HT212529https://support.apple.com/kb/HT212530https://support.apple.com/kb/HT212531https://www.debian.org/security/2021/dsa-4845https://cert-portal.siemens.com/productcert/html/ssa-398330.html
2021-01-26
Published