CVE-2021-46829: Integer Overflow
First published: Sun Jul 24 2022(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNOME gdk-pixbuf | <2.42.8 | |
| Fedoraproject Fedora | =35 | |
| Debian Debian Linux | =11.0 | |
| debian/gdk-pixbuf | 2.38.1+dfsg-1 2.42.2+dfsg-1+deb11u1 2.42.10+dfsg-1 |
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Reference Links
- 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
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/5398f04d772f7f8baf5265715696ed88db0f0512
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/bca00032ad68d0b0aa2c1f7558db931e52bd9cd2
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/190
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/121
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M5IHHEYFD6GDZVALKIPPRD2U4JNZUZWR/
- https://www.debian.org/security/2022/dsa-5228
- https://www.openwall.com/lists/oss-security/2022/07/23/1
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/6976bdc8ee9dd2c2954f91066f7b0f643769a379
- https://security-tracker.debian.org/tracker/CVE-2021-46829
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5IHHEYFD6GDZVALKIPPRD2U4JNZUZWR/
Frequently Asked Questions
What is the vulnerability CVE-2021-46829?
CVE-2021-46829 is a heap-based buffer overflow vulnerability in GNOME GdkPixbuf before version 2.42.8, which can be abused for code execution.
How does the vulnerability CVE-2021-46829 occur?
The vulnerability occurs when compositing or clearing frames in GIF files using GdkPixbuf in GNOME.
What is the severity of CVE-2021-46829?
The severity of CVE-2021-46829 is high, with a CVSS score of 7.8.
Which systems are affected by CVE-2021-46829?
GNOME GdkPixbuf versions before 2.42.8 are affected, as well as Fedora 35 and Debian Linux 11.0.
How can CVE-2021-46829 be fixed?
To fix CVE-2021-46829, users should update to GDK-PixBuf version 2.42.8 or later.
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