Bug 2114940 (CVE-2021-46829)

Summary:	CVE-2021-46829 gdk-pixbuf: heap-based buffer overflow when compositing or clearing frames in GIF files
Product:	[Other] Security Response	Reporter:	Sandipan Roy <saroy>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dffrench, erik-fedora, fedora, fjansen, gnome-sig, gzaronik, jwong, kaycoth, klember, kshier, manisandro, mclasen, ngough, otte, rgodfrey, rh-spice-bugs, rjones
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	gdk-pixbuf 2.42.8	Doc Type:	If docs needed, set a value
Doc Text:	A heap-based buffer overflow vulnerability was found in GNOME GdkPixbuf (aka GDK-PixBuf) when compositing or clearing frames in GIF files. The vulnerability exists due to a boundary error when processing GIF images. This flaw allows an attacker to create a specially crafted GIF image, trick the victim into opening it, triggering an out-of-bounds write, which allows executing arbitrary code on the target system or causing a potential crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-09 15:13:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2114942, 2114943, 2115213
Bug Blocks:	2111230

Description Sandipan Roy 2022-08-03 14:50:58 UTC

GNOME GdkPixbuf (aka GDK-PixBuf) before 2.42.8 allows a heap-based buffer overflow when compositing or clearing frames in GIF files, as demonstrated by io-gif-animation.c composite_frame. This overflow is controllable and could be abused for code execution, especially on 32-bit systems.

https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/bca00032ad68d0b0aa2c1f7558db931e52bd9cd2
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/5398f04d772f7f8baf5265715696ed88db0f0512
https://www.openwall.com/lists/oss-security/2022/07/23/1
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/190
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/121
http://www.openwall.com/lists/oss-security/2022/07/25/1
https://github.com/pedrib/PoC/blob/master/fuzzing/CVE-2021-46829/CVE-2021-46829.md

Comment 1 Sandipan Roy 2022-08-03 14:54:48 UTC

Created gdk-pixbuf2 tracking bugs for this issue:

Affects: fedora-all [bug 2114942]


Created mingw-gdk-pixbuf tracking bugs for this issue:

Affects: fedora-all [bug 2114943]

Comment 4 TEJ RATHI 2022-08-09 05:15:34 UTC

Statement: Red Hat Enterprise Linux - 6, 7, 8 are not affected, because there is no presence of vulnerable function/code in our code-base.

Comment 5 errata-xmlrpc 2023-05-09 07:18:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2216 https://access.redhat.com/errata/RHSA-2023:2216

Comment 6 Product Security DevOps Team 2023-05-09 15:13:21 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-46829