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AUSCERT External Security Bulletin Redistribution
ESB-2023.0756
tigervnc security update
9 February 2023
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: tigervnc
Publisher: Red Hat
Operating System: Red Hat
Resolution: Patch/Upgrade
CVE Names: CVE-2023-0494
Original Bulletin:
https://access.redhat.com/errata/RHSA-2023:0664
Comment: CVSS (Max): 7.8 CVE-2023-0494 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Red Hat
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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Red Hat Security Advisory
Synopsis: Important: tigervnc security update
Advisory ID: RHSA-2023:0664-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0664
Issue date: 2023-02-08
CVE Names: CVE-2023-0494
=====================================================================
1. Summary:
An update for tigervnc is now available for Red Hat Enterprise Linux 8.4
Extended Update Support.
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 AppStream EUS (v.8.4) - aarch64, noarch, ppc64le, s390x, x86_64
3. Description:
Virtual Network Computing (VNC) is a remote display system which allows
users to view a computing desktop environment not only on the machine where
it is running, but from anywhere on the Internet and from a wide variety of
machine architectures. TigerVNC is a suite of VNC servers and clients.
Security Fix(es):
* xorg-x11-server: DeepCopyPointerClasses use-after-free leads to privilege
elevation (CVE-2023-0494)
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/):
2165995 - CVE-2023-0494 xorg-x11-server: DeepCopyPointerClasses use-after-free leads to privilege elevation
6. Package List:
Red Hat Enterprise Linux AppStream EUS (v.8.4):
Source:
tigervnc-1.11.0-8.el8_4.1.src.rpm
aarch64:
tigervnc-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-debuginfo-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-debugsource-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-server-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-server-debuginfo-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-server-minimal-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-server-minimal-debuginfo-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-server-module-1.11.0-8.el8_4.1.aarch64.rpm
tigervnc-server-module-debuginfo-1.11.0-8.el8_4.1.aarch64.rpm
noarch:
tigervnc-icons-1.11.0-8.el8_4.1.noarch.rpm
tigervnc-license-1.11.0-8.el8_4.1.noarch.rpm
tigervnc-selinux-1.11.0-8.el8_4.1.noarch.rpm
ppc64le:
tigervnc-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-debuginfo-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-debugsource-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-server-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-server-debuginfo-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-server-minimal-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-server-minimal-debuginfo-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-server-module-1.11.0-8.el8_4.1.ppc64le.rpm
tigervnc-server-module-debuginfo-1.11.0-8.el8_4.1.ppc64le.rpm
s390x:
tigervnc-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-debuginfo-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-debugsource-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-server-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-server-debuginfo-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-server-minimal-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-server-minimal-debuginfo-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-server-module-1.11.0-8.el8_4.1.s390x.rpm
tigervnc-server-module-debuginfo-1.11.0-8.el8_4.1.s390x.rpm
x86_64:
tigervnc-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-debuginfo-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-debugsource-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-server-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-server-debuginfo-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-server-minimal-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-server-minimal-debuginfo-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-server-module-1.11.0-8.el8_4.1.x86_64.rpm
tigervnc-server-module-debuginfo-1.11.0-8.el8_4.1.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-2023-0494
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 2023 Red Hat, Inc.
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