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Red Hat 9 RHSA-2023:2257-01 Moderate Tigervnc Remote Access Fix

red hat
Calendar Grey May 9, 2023
Dist Redhat Esm H88
Red Hat Security Update for tigervnc presents a moderate level security patch along with various bug rectifications. Discover additional details here.
An update for tigervnc is now available for Red Hat Enterprise Linux 9

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: XkbGetKbdByName use-after-free (CVE-2022-4283)
* xorg-x11-server: XTestSwapFakeInput stack overflow (CVE-2022-46340)
* xorg-x11-server: XIPassiveUngrab out-of-bounds access (CVE-2022-46341)
* xorg-x11-server: XvdiSelectVideoNotify use-after-free (CVE-2022-46342)
* xorg-x11-server: ScreenSaverSetAttributes use-after-free (CVE-2022-46343)
* xorg-x11-server: XIChangeProperty out-of-bounds access (CVE-2022-46344)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.2 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat remote access security fix moderate severity bug fixes tigervnc

References

https://access.redhat.com/security/cve/CVE-2022-4283 https://access.redhat.com/security/cve/CVE-2022-46340 https://access.redhat.com/security/cve/CVE-2022-46341 https://access.redhat.com/security/cve/CVE-2022-46342 https://access.redhat.com/security/cve/CVE-2022-46343 https://access.redhat.com/security/cve/CVE-2022-46344 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.2_release_notes/index

Package List

Red Hat Enterprise Linux AppStream (v. 9):
Source: tigervnc-1.12.0-13.el9_2.src.rpm
aarch64: tigervnc-1.12.0-13.el9_2.aarch64.rpm tigervnc-debuginfo-1.12.0-13.el9_2.aarch64.rpm tigervnc-debugsource-1.12.0-13.el9_2.aarch64.rpm tigervnc-server-1.12.0-13.el9_2.aarch64.rpm tigervnc-server-debuginfo-1.12.0-13.el9_2.aarch64.rpm tigervnc-server-minimal-1.12.0-13.el9_2.aarch64.rpm tigervnc-server-minimal-debuginfo-1.12.0-13.el9_2.aarch64.rpm tigervnc-server-module-1.12.0-13.el9_2.aarch64.rpm tigervnc-server-module-debuginfo-1.12.0-13.el9_2.aarch64.rpm
noarch: tigervnc-icons-1.12.0-13.el9_2.noarch.rpm tigervnc-license-1.12.0-13.el9_2.noarch.rpm tigervnc-selinux-1.12.0-13.el9_2.noarch.rpm
ppc64le: tigervnc-1.12.0-13.el9_2.ppc64le.rpm tigervnc-debuginfo-1.12.0-13.el9_2.ppc64le.rpm tigervnc-debugsource-1.12.0-13.el9_2.ppc64le.rpm tigervnc-server-1.12.0-13.el9_2.ppc64le.rpm tigervnc-server-debuginfo-1.12.0-13.el9_2.ppc64le.rpm tigervnc-server-minimal-1.12.0-13.el9_2.ppc64le.rpm tigervnc-server-minimal-debuginfo-1.12.0-13.el9_2.ppc64le.rpm tigervnc-server-module-1.12.0-13.el9_2.ppc64le.rpm tigervnc-server-module-debuginfo-1.12.0-13.el9_2.ppc64le.rpm
s390x: tigervnc-1.12.0-13.el9_2.s390x.rpm tigervnc-debuginfo-1.12.0-13.el9_2.s390x.rpm

Read the Full Advisory


Advisory ID: RHSA-2023:2257-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:2257
Issue date: 2023-05-09

Topic

An update for tigervnc is now available for Red Hat Enterprise Linux 9.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat remote access security fix moderate severity bug fixes tigervnc

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 9) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

2119016 - 'ghost pointer' behavior observed when using TigerVNC's x0vncserver

2119017 - x0vncserver incorrectly maps keysym from vncclient running german keyboard

2151755 - CVE-2022-46340 xorg-x11-server: XTestSwapFakeInput stack overflow

2151756 - CVE-2022-46341 xorg-x11-server: XIPassiveUngrab out-of-bounds access

2151757 - CVE-2022-46342 xorg-x11-server: XvdiSelectVideoNotify use-after-free

2151758 - CVE-2022-46343 xorg-x11-server: ScreenSaverSetAttributes use-after-free

2151760 - CVE-2022-46344 xorg-x11-server: XIChangeProperty out-of-bounds access

2151761 - CVE-2022-4283 xorg-x11-server: XkbGetKbdByName use-after-free

2164703 - selinux policy will not allow tigervnc-server to start

2169965 - Backport upstream fix for broken keyboard handling

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