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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 Severity Score

5.5

Score breakdown

Status

Package Release Status
ghostscript
Launchpad, Ubuntu, Debian
kinetic Not vulnerable
(9.56.1~dfsg1-0ubuntu3)
upstream
Released (9.56.0~dfsg-1)
bionic Not vulnerable
(9.26~dfsg+0-0ubuntu0.18.04.16)
focal Not vulnerable
(9.50~dfsg-5ubuntu4.5)
impish Ignored
(end of life)
jammy
Released (9.55.0~dfsg1-0ubuntu5.1)
Patches:
upstream: https://git.ghostscript.com/?p=ghostpdl.git;h=ae1061d948d88667bdf51d47d918c4684d0f67df

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H