CVE-2020-24659
published 2020-09-04CVE-2020-24659: An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with…
PriorityP338high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
3.73%
88.6th percentile
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| debian | gnutls28 | < gnutls28 3.6.15-1 (bookworm) | gnutls28 3.6.15-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| gnu | gnutls | < 3.6.15 | 3.6.15 |
| msrc | cbl2_gnutls_3.6.14-5_on_cbl_mariner_2.0 | — | — |
| msrc | cm1_gnutls_3.6.14-3_on_cbl_mariner_1.0 | — | — |
| opensuse | leap | — | — |
| opensuse | leap | — | — |
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
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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
Ubuntu
GnuTLS vulnerability
vendor_ubuntu·2020-09-09
CVE-2020-24659 GnuTLS vulnerability
Title: GnuTLS vulnerability
Summary: GnuTLS could be made to crash or run programs if it received specially
crafted network traffic.
It was discovered that GnuTLS incorrectly handled certain alerts when being
used with TLS 1.3 servers. A remote attacker could use this issue to cause
GnuTLS to crash, resulting in a denial of service, or possibly execute
arbitrary code.
Instructions: In general, a standard system update will make all the necessary changes.
Microsoft
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing and then an invalid seco
vendor_msrc·2020-09-08·CVSS 7.5
CVE-2020-24659 [HIGH] CWE-787 An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing and then an invalid seco
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing and then an invalid second handshake occurs. The crash happens in the application's error handling path where the gnutls_deinit function is called after detecting a handshake failure.
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 i
Red Hat
gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
vendor_redhat·2020-09-04·CVSS 7.5
CVE-2020-24659 [HIGH] CWE-20 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.
A flaw was found in GnuTLS, where the server can trigger the client to run into heap buffer overflow if a no_renegotiation alert is sent in an unexpected timing. This flaw allows the client to crash at the session deinitialization timing. The highest threat from this vulnerability is to system availability.
Statement: This issue only affects TLS 1.3 implemen
Debian
CVE-2020-24659: gnutls28 - An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL poi...
vendor_debian·2020·CVSS 7.5
CVE-2020-24659 [HIGH] CVE-2020-24659: gnutls28 - An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL poi...
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.
Scope: local
bookworm: resolved (fixed in 3.6.15-1)
bullseye: resolved (fixed in 3.6.15-1)
forky: resolved (fixed in 3.6.15-1)
sid: resolved (fixed in 3.6.15-1)
trixie: resolved (fixed in 3.6.15-1)
GHSA
GHSA-wx7m-j6j8-xm63: An issue was discovered in GnuTLS before 3
ghsa_unreviewed·2022-05-24
CVE-2020-24659 [MEDIUM] CWE-787 GHSA-wx7m-j6j8-xm63: An issue was discovered in GnuTLS before 3
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.
OSV
CVE-2020-24659: An issue was discovered in GnuTLS before 3
osv·2020-09-04·CVSS 7.5
CVE-2020-24659 [HIGH] CVE-2020-24659: An issue was discovered in GnuTLS before 3
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-24659 gnutls30: gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [epel-6]
bugzilla·2020-09-04·CVSS 7.5
CVE-2020-24659 [HIGH] CVE-2020-24659 gnutls30: gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [epel-6]
CVE-2020-24659 gnutls30: gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [epel-6]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-6.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
Discussion:
Use the foll
Bugzilla
CVE-2020-24659 mingw-gnutls: gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [fedora-all]
bugzilla·2020-09-04·CVSS 7.5
CVE-2020-24659 [HIGH] CVE-2020-24659 mingw-gnutls: gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [fedora-all]
CVE-2020-24659 mingw-gnutls: gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this is
Bugzilla
CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [fedora-all]
bugzilla·2020-09-04·CVSS 7.5
CVE-2020-24659 [HIGH] CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [fedora-all]
CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects mu
Bugzilla
CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
bugzilla·2020-08-24·CVSS 7.5
CVE-2020-24659 [HIGH] CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
A flaw was found in Gnutls. The server can trigger the client to run into heap buffer overflow if a no_renegotiation alert is sent in an unexpected timing. That may cause the client to crash at the session deinitialization timing.
Upstream issue:
https://gitlab.com/gnutls/gnutls/-/issues/1071
Discussion:
Acknowledgments:
Name: the GnuTLS project
---
Statement:
This issue only affects TLS 1.3 implementation of GnuTLS which is available on GnuTLS 3.6.x branch. Therefore only GnuTLS packages shipped with Red Hat Enterprise Linux 8 are affected by this flaw.
---
External References:
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
---
Created gnutls tracking bugs for this issue:
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.htmlhttps://gitlab.com/gnutls/gnutls/-/issues/1071https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/https://security.gentoo.org/glsa/202009-01https://security.netapp.com/advisory/ntap-20200911-0006/https://usn.ubuntu.com/4491-1/https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.htmlhttps://gitlab.com/gnutls/gnutls/-/issues/1071https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/https://security.gentoo.org/glsa/202009-01https://security.netapp.com/advisory/ntap-20200911-0006/https://usn.ubuntu.com/4491-1/https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
2020-09-04
Published