RHSA-2023:0045 - Security Advisory

Topic

An update for tigervnc is now available for Red Hat Enterprise Linux 7.

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.

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: X.Org Server XkbGetKbdByName use-after-free (CVE-2022-4283)
• xorg-x11-server: X.Org Server XTestSwapFakeInput stack overflow (CVE-2022-46340)
• xorg-x11-server: X.Org Server XIPassiveUngrab out-of-bounds access (CVE-2022-46341)
• xorg-x11-server: X.Org Server XvdiSelectVideoNotify use-after-free (CVE-2022-46342)
• xorg-x11-server: X.Org Server ScreenSaverSetAttributes use-after-free (CVE-2022-46343)
• xorg-x11-server: X.Org 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.

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

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 2151755 - CVE-2022-46340 xorg-x11-server: X.Org Server XTestSwapFakeInput stack overflow
• BZ - 2151756 - CVE-2022-46341 xorg-x11-server: X.Org Server XIPassiveUngrab out-of-bounds access
• BZ - 2151757 - CVE-2022-46342 xorg-x11-server: X.Org Server XvdiSelectVideoNotify use-after-free
• BZ - 2151758 - CVE-2022-46343 xorg-x11-server: X.Org Server ScreenSaverSetAttributes use-after-free
• BZ - 2151760 - CVE-2022-46344 xorg-x11-server: X.Org Server XIChangeProperty out-of-bounds access
• BZ - 2151761 - CVE-2022-4283 xorg-x11-server: X.Org Server XkbGetKbdByName use-after-free

CVEs

• CVE-2022-4283
• CVE-2022-46340
• CVE-2022-46341
• CVE-2022-46342
• CVE-2022-46343
• CVE-2022-46344

References

• https://access.redhat.com/security/updates/classification/#important