RHSA-2023:2805 - Security Advisory

Topic

An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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

Xwayland is an X server for running X clients under Wayland.

Security Fix(es):

• xorg-x11-server: buffer overflow in _GetCountedString() in xkb/xkb.c (CVE-2022-3550)
• 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)
• xorg-x11-server: DeepCopyPointerClasses use-after-free leads to privilege elevation (CVE-2023-0494)
• xorg-x11-server: memory leak in ProcXkbGetKbdByName() in xkb/xkb.c (CVE-2022-3551)

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.

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 for x86_64 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.8 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.8 x86_64
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.8 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.8 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.8 x86_64

Fixes

• BZ - 2140698 - CVE-2022-3550 xorg-x11-server: buffer overflow in _GetCountedString() in xkb/xkb.c
• BZ - 2140701 - CVE-2022-3551 xorg-x11-server: memory leak in ProcXkbGetKbdByName() in xkb/xkb.c
• BZ - 2151755 - CVE-2022-46340 xorg-x11-server: XTestSwapFakeInput stack overflow
• BZ - 2151756 - CVE-2022-46341 xorg-x11-server: XIPassiveUngrab out-of-bounds access
• BZ - 2151757 - CVE-2022-46342 xorg-x11-server: XvdiSelectVideoNotify use-after-free
• BZ - 2151758 - CVE-2022-46343 xorg-x11-server: ScreenSaverSetAttributes use-after-free
• BZ - 2151760 - CVE-2022-46344 xorg-x11-server: XIChangeProperty out-of-bounds access
• BZ - 2151761 - CVE-2022-4283 xorg-x11-server: XkbGetKbdByName use-after-free
• BZ - 2165995 - CVE-2023-0494 xorg-x11-server: DeepCopyPointerClasses use-after-free leads to privilege elevation

CVEs

• CVE-2022-3550
• CVE-2022-3551
• CVE-2022-4283
• CVE-2022-46340
• CVE-2022-46341
• CVE-2022-46342
• CVE-2022-46343
• CVE-2022-46344
• CVE-2023-0494

References

• 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