Bug 1872021 (CVE-2020-24659) - CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
Summary: CVE-2020-24659 gnutls: Heap buffer overflow in handshake with no_renegotiatio...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-24659
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1873959 1875862 1875863 1875864 1903038
Blocks: 1872022
TreeView+ depends on / blocked
 
Reported: 2020-08-24 21:01 UTC by Pedro Sampaio
Modified: 2024-06-13 22:59 UTC (History)
17 users (show)

Fixed In Version: gnutls 3.6.15
Clone Of:
Environment:
Last Closed: 2020-12-15 22:18:46 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:5483 0 None None None 2020-12-15 16:43:10 UTC

Description Pedro Sampaio 2020-08-24 21:01:37 UTC 
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
Comment 2 Huzaifa S. Sidhpurwala 2020-08-31 08:06:19 UTC 
Acknowledgments:

Name: the GnuTLS project
Comment 3 Huzaifa S. Sidhpurwala 2020-08-31 10:14:02 UTC 
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.
Comment 4 Huzaifa S. Sidhpurwala 2020-09-04 14:59:15 UTC 
External References:

https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
Comment 5 Huzaifa S. Sidhpurwala 2020-09-04 15:00:04 UTC 
Created gnutls tracking bugs for this issue:

Affects: fedora-all [bug 1875863]


Created gnutls30 tracking bugs for this issue:

Affects: epel-6 [bug 1875862]


Created mingw-gnutls tracking bugs for this issue:

Affects: fedora-all [bug 1875864]
Comment 6 Huzaifa S. Sidhpurwala 2020-10-26 15:28:37 UTC 
Reproducer: There is a reproducer available in the upstream bug at: https://gitlab.com/gnutls/gnutls/-/issues/1071 which works with ASAN builds.
Comment 7 errata-xmlrpc 2020-12-15 16:43:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:5483 https://access.redhat.com/errata/RHSA-2020:5483
Comment 8 Product Security DevOps Team 2020-12-15 22:18:46 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-24659
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