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Red Hat 8 RHSA-2023-2830 Moderate: tigervnc Remote Access Issues

red hat
Calendar Grey May 16, 2023
Dist Redhat Esm H88
An essential security patch released for tigervnc in Red Hat Enterprise Linux 8, focusing on significant vulnerabilities.
An update for tigervnc is now available for Red Hat Enterprise Linux 8

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 8.8 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat remote access security fix moderate severity network application 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/8/html/8.8_release_notes/index

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: tigervnc-1.12.0-15.el8_8.src.rpm
aarch64: tigervnc-1.12.0-15.el8_8.aarch64.rpm tigervnc-debuginfo-1.12.0-15.el8_8.aarch64.rpm tigervnc-debugsource-1.12.0-15.el8_8.aarch64.rpm tigervnc-server-1.12.0-15.el8_8.aarch64.rpm tigervnc-server-debuginfo-1.12.0-15.el8_8.aarch64.rpm tigervnc-server-minimal-1.12.0-15.el8_8.aarch64.rpm tigervnc-server-minimal-debuginfo-1.12.0-15.el8_8.aarch64.rpm tigervnc-server-module-1.12.0-15.el8_8.aarch64.rpm tigervnc-server-module-debuginfo-1.12.0-15.el8_8.aarch64.rpm
noarch: tigervnc-icons-1.12.0-15.el8_8.noarch.rpm tigervnc-license-1.12.0-15.el8_8.noarch.rpm tigervnc-selinux-1.12.0-15.el8_8.noarch.rpm
ppc64le: tigervnc-1.12.0-15.el8_8.ppc64le.rpm tigervnc-debuginfo-1.12.0-15.el8_8.ppc64le.rpm tigervnc-debugsource-1.12.0-15.el8_8.ppc64le.rpm tigervnc-server-1.12.0-15.el8_8.ppc64le.rpm tigervnc-server-debuginfo-1.12.0-15.el8_8.ppc64le.rpm tigervnc-server-minimal-1.12.0-15.el8_8.ppc64le.rpm tigervnc-server-minimal-debuginfo-1.12.0-15.el8_8.ppc64le.rpm tigervnc-server-module-1.12.0-15.el8_8.ppc64le.rpm tigervnc-server-module-debuginfo-1.12.0-15.el8_8.ppc64le.rpm
s390x: tigervnc-1.12.0-15.el8_8.s390x.rpm tigervnc-debuginfo-1.12.0-15.el8_8.s390x.rpm

Read the Full Advisory


Advisory ID: RHSA-2023:2830-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:2830
Issue date: 2023-05-16

Topic

An update for tigervnc is now available for Red Hat Enterprise Linux 8.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 network application tigervnc

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1437569 - 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

2164704 - selinux policy will not allow tigervnc-server to start

2169960 - Backport upstream fix for broken keyboard handling

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