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CVE-2022-1922

Published: 19 July 2022

DOS / potential heap overwrite in mkv demuxing using zlib decompression. Integer overflow in matroskademux element in gst_matroska_decompress_data function which causes a segfault, or could cause a heap overwrite, depending on libc and OS. Depending on the libc used, and the underlying OS capabilities, it could be just a segfault or a heap overwrite. If the libc uses mmap for large chunks, and the OS supports mmap, then it is just a segfault (because the realloc before the integer overflow will use mremap to reduce the size of the chunk, and it will start to write to unmapped memory). However, if using a libc implementation that does not use mmap, or if the OS does not support mmap while using libc, then this could result in a heap overwrite.

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
gst-plugins-good1.0
Launchpad, Ubuntu, Debian
bionic
Released (1.14.5-0ubuntu1~18.04.3)
focal
Released (1.16.3-0ubuntu1.1)
impish Ignored
(reached end-of-life)
jammy
Released (1.20.3-0ubuntu1)
kinetic Not vulnerable

trusty Ignored
(out of standard support)
upstream Needs triage

xenial
Released (1.8.3-1ubuntu0.5+esm1)
Patches:
upstream: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/14d306da6da51a762c4dc701d161bb52ab66d774 (not CVE assigned but related)
usptream: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/ad6012159acf18c6b5c0f4edf037e8c9a2dbc966

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H