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RedHat: RHSA-2023-0623 Important: Tigervnc Privilege Escalation Fix

red hat
Calendar Grey February 7, 2023
Scroller Redhat
A significant patch has been issued for tigervnc addressing privilege escalation vulnerabilities, applicable to RHEL 9.0 Extended Update Support.
An update for tigervnc is now available for Red Hat Enterprise Linux 9.0 Extended Update Support

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

Summary

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.

Topics%20covered

Topics Covered

security advisory privilege escalation security fix important RHEL tigervnc

References

https://access.redhat.com/security/cve/CVE-2023-0494 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream EUS (v.9.0):
Source: tigervnc-1.11.0-22.el9_0.1.src.rpm
aarch64: tigervnc-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-debuginfo-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-debugsource-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-server-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-server-debuginfo-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-server-minimal-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-server-minimal-debuginfo-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-server-module-1.11.0-22.el9_0.1.aarch64.rpm tigervnc-server-module-debuginfo-1.11.0-22.el9_0.1.aarch64.rpm
noarch: tigervnc-icons-1.11.0-22.el9_0.1.noarch.rpm tigervnc-license-1.11.0-22.el9_0.1.noarch.rpm tigervnc-selinux-1.11.0-22.el9_0.1.noarch.rpm
ppc64le: tigervnc-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-debuginfo-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-debugsource-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-server-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-server-debuginfo-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-server-minimal-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-server-minimal-debuginfo-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-server-module-1.11.0-22.el9_0.1.ppc64le.rpm tigervnc-server-module-debuginfo-1.11.0-22.el9_0.1.ppc64le.rpm
s390x: tigervnc-1.11.0-22.el9_0.1.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:0623-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0623
Issue date: 2023-02-07

Topic

An update for tigervnc is now available for Red Hat Enterprise Linux 9.0Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory privilege escalation security fix important RHEL tigervnc

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream EUS (v.9.0) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

2165995 - CVE-2023-0494 xorg-x11-server: DeepCopyPointerClasses use-after-free leads to privilege elevation

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