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CVE-2022-2085

Published: 16 June 2022

A NULL pointer dereference vulnerability was found in Ghostscript, which occurs when it tries to render a large number of bits in memory. When allocating a buffer device, it relies on an init_device_procs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, mem_x_device is used and does not have an init_device_procs defined. This flaw allows an attacker to parse a large number of bits (more than 64 bits per pixel), which triggers a NULL pointer dereference flaw, causing an application to crash.

Notes

AuthorNote
mdeslaur
code in focal and earlier doesn't look vulnerable to this issue
Priority

Low

CVSS 3 base score: 5.5

Status

Package Release Status
ghostscript
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(9.26~dfsg+0-0ubuntu0.18.04.16)
focal Not vulnerable
(9.50~dfsg-5ubuntu4.5)
impish Ignored
(reached end-of-life)
jammy
Released (9.55.0~dfsg1-0ubuntu5.1)
kinetic Not vulnerable
(9.56.1~dfsg1-0ubuntu3)
upstream
Released (9.56.0~dfsg-1)
xenial Not vulnerable

Patches:
upstream: https://git.ghostscript.com/?p=ghostpdl.git;h=ae1061d948d88667bdf51d47d918c4684d0f67df