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FreeBSD: VID-76C8B690-340B-11EB-A2B7-54E1AD3D6335 (CVE-2020-25712): xorg-server -- Multiple input validation failures in X server XKB extension

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FreeBSD: VID-76C8B690-340B-11EB-A2B7-54E1AD3D6335 (CVE-2020-25712): xorg-server -- Multiple input validation failures in X server XKB extension

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
12/01/2020
Created
12/04/2020
Added
12/02/2020
Modified
12/18/2020

Description

Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.

From VID-76C8B690-340B-11EB-A2B7-54E1AD3D6335:

The X.org project reports:

These issues can lead to privileges elevations for authorized

clients on systems where the X server is running privileged.

Insufficient checks on the lengths of the XkbSetMap request can

lead to out of bounds memory accesses in the X server.

Insufficient checks on input of the XkbSetDeviceInfo request can

lead to a buffer overflow on the head in the X server.

Solution(s)

  • freebsd-upgrade-package-xephyr
  • freebsd-upgrade-package-xorg-dmx
  • freebsd-upgrade-package-xorg-nestserver
  • freebsd-upgrade-package-xorg-server
  • freebsd-upgrade-package-xorg-vfbserver
  • freebsd-upgrade-package-xwayland

References

  • CVE-2020-25712
  • USN-4656-1

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