Bug 2114940 (CVE-2021-46829) - CVE-2021-46829 gdk-pixbuf: heap-based buffer overflow when compositing or clearing frames in GIF files
Summary: CVE-2021-46829 gdk-pixbuf: heap-based buffer overflow when compositing or cle...
Keywords:
Status: NEW
Alias: CVE-2021-46829
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2115213 2114942 2114943
Blocks: 2111230
TreeView+ depends on / blocked
 
Reported: 2022-08-03 14:50 UTC by Sandipan Roy
Modified: 2023-03-03 08:37 UTC (History)
17 users (show)

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.
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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.
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