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AUSCERT External Security Bulletin Redistribution
ESB-2021.2924
libX11 security update
31 August 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libX11
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-31535
Reference: ESB-2021.2129
ESB-2021.2065
ESB-2021.1828
ESB-2021.1801
ESB-2021.1793
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:3296
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Red Hat Security Advisory
Synopsis: Important: libX11 security update
Advisory ID: RHSA-2021:3296-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3296
Issue date: 2021-08-30
CVE Names: CVE-2021-31535
=====================================================================
1. Summary:
An update for libX11 is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
3. Description:
The libX11 packages contain the core X11 protocol client library.
Security Fix(es):
* libX11: missing request length checks (CVE-2021-31535)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
4. Solution:
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed (https://bugzilla.redhat.com/):
1961822 - CVE-2021-31535 libX11: missing request length checks
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
libX11-1.6.7-4.el7_9.src.rpm
noarch:
libX11-common-1.6.7-4.el7_9.noarch.rpm
x86_64:
libX11-1.6.7-4.el7_9.i686.rpm
libX11-1.6.7-4.el7_9.x86_64.rpm
libX11-debuginfo-1.6.7-4.el7_9.i686.rpm
libX11-debuginfo-1.6.7-4.el7_9.x86_64.rpm
libX11-devel-1.6.7-4.el7_9.i686.rpm
libX11-devel-1.6.7-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
libX11-1.6.7-4.el7_9.src.rpm
noarch:
libX11-common-1.6.7-4.el7_9.noarch.rpm
x86_64:
libX11-1.6.7-4.el7_9.i686.rpm
libX11-1.6.7-4.el7_9.x86_64.rpm
libX11-debuginfo-1.6.7-4.el7_9.i686.rpm
libX11-debuginfo-1.6.7-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
libX11-debuginfo-1.6.7-4.el7_9.i686.rpm
libX11-debuginfo-1.6.7-4.el7_9.x86_64.rpm
libX11-devel-1.6.7-4.el7_9.i686.rpm
libX11-devel-1.6.7-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
libX11-1.6.7-4.el7_9.src.rpm
noarch:
libX11-common-1.6.7-4.el7_9.noarch.rpm
ppc64:
libX11-1.6.7-4.el7_9.ppc.rpm
libX11-1.6.7-4.el7_9.ppc64.rpm
libX11-debuginfo-1.6.7-4.el7_9.ppc.rpm
libX11-debuginfo-1.6.7-4.el7_9.ppc64.rpm
libX11-devel-1.6.7-4.el7_9.ppc.rpm
libX11-devel-1.6.7-4.el7_9.ppc64.rpm
ppc64le:
libX11-1.6.7-4.el7_9.ppc64le.rpm
libX11-debuginfo-1.6.7-4.el7_9.ppc64le.rpm
libX11-devel-1.6.7-4.el7_9.ppc64le.rpm
s390x:
libX11-1.6.7-4.el7_9.s390.rpm
libX11-1.6.7-4.el7_9.s390x.rpm
libX11-debuginfo-1.6.7-4.el7_9.s390.rpm
libX11-debuginfo-1.6.7-4.el7_9.s390x.rpm
libX11-devel-1.6.7-4.el7_9.s390.rpm
libX11-devel-1.6.7-4.el7_9.s390x.rpm
x86_64:
libX11-1.6.7-4.el7_9.i686.rpm
libX11-1.6.7-4.el7_9.x86_64.rpm
libX11-debuginfo-1.6.7-4.el7_9.i686.rpm
libX11-debuginfo-1.6.7-4.el7_9.x86_64.rpm
libX11-devel-1.6.7-4.el7_9.i686.rpm
libX11-devel-1.6.7-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
libX11-1.6.7-4.el7_9.src.rpm
noarch:
libX11-common-1.6.7-4.el7_9.noarch.rpm
x86_64:
libX11-1.6.7-4.el7_9.i686.rpm
libX11-1.6.7-4.el7_9.x86_64.rpm
libX11-debuginfo-1.6.7-4.el7_9.i686.rpm
libX11-debuginfo-1.6.7-4.el7_9.x86_64.rpm
libX11-devel-1.6.7-4.el7_9.i686.rpm
libX11-devel-1.6.7-4.el7_9.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2021-31535
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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