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Red Hat Security Advisory 2023-0663-01

Red Hat Security Advisory 2023-0663-01
Posted Feb 8, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-0663-01 - Virtual Network Computing 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. Issues addressed include a use-after-free vulnerability.

tags | advisory, remote
systems | linux, redhat
advisories | CVE-2023-0494
SHA-256 | 86b0e9d934701c53f72e7dd5b26a50e5d21743f95864345f957fb5a67cecb60b

Red Hat Security Advisory 2023-0663-01

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====================================================================
Red Hat Security Advisory

Synopsis: Important: tigervnc security update
Advisory ID: RHSA-2023:0663-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0663
Issue date: 2023-02-08
CVE Names: CVE-2023-0494
====================================================================
1. Summary:

An update for tigervnc is now available for Red Hat Enterprise Linux 8.6
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.8.6) - 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.8.6):

Source:
tigervnc-1.12.0-6.el8_6.1.src.rpm

aarch64:
tigervnc-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-debuginfo-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-debugsource-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-server-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-server-debuginfo-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-server-minimal-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-server-minimal-debuginfo-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-server-module-1.12.0-6.el8_6.1.aarch64.rpm
tigervnc-server-module-debuginfo-1.12.0-6.el8_6.1.aarch64.rpm

noarch:
tigervnc-icons-1.12.0-6.el8_6.1.noarch.rpm
tigervnc-license-1.12.0-6.el8_6.1.noarch.rpm
tigervnc-selinux-1.12.0-6.el8_6.1.noarch.rpm

ppc64le:
tigervnc-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-debuginfo-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-debugsource-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-server-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-server-debuginfo-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-server-minimal-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-server-minimal-debuginfo-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-server-module-1.12.0-6.el8_6.1.ppc64le.rpm
tigervnc-server-module-debuginfo-1.12.0-6.el8_6.1.ppc64le.rpm

s390x:
tigervnc-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-debuginfo-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-debugsource-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-server-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-server-debuginfo-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-server-minimal-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-server-minimal-debuginfo-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-server-module-1.12.0-6.el8_6.1.s390x.rpm
tigervnc-server-module-debuginfo-1.12.0-6.el8_6.1.s390x.rpm

x86_64:
tigervnc-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-debuginfo-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-debugsource-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-server-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-server-debuginfo-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-server-minimal-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-server-minimal-debuginfo-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-server-module-1.12.0-6.el8_6.1.x86_64.rpm
tigervnc-server-module-debuginfo-1.12.0-6.el8_6.1.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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