CVE-2021-46829

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.

gdk is written in C but has been designed from the ground up to support a wide range of languages. It provide a complete set of widgets,and suitable for projects ranging from small one-off tools to complete application suites.

Security Fix(es):

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.(CVE-2021-46829)

gdk is written in C but has been designed from the ground up to support a wide range of languages. It provide a complete set of widgets,and suitable for projects ranging from small one-off tools to complete application suites.

Security Fix(es):

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.(CVE-2021-46829)

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.

The gdk-pixbuf2 packages provide an image loading library that can be extended by loadable modules for new image formats. It is used by toolkits such as GTK+ or clutter.

Security Fix(es):

• gdk-pixbuf: heap-buffer overflow when decoding the lzw compressed stream of image data (CVE-2021-44648)
• gdk-pixbuf: heap-based buffer overflow when compositing or clearing frames in GIF files (CVE-2021-46829)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

It was discovered that gdk-pixbuf contained a buffer overwrite in
io-gif-animation.c composite_frame() exploitable using a crafted GIF (CVE-2021-46829).

These are all security issues fixed in the gdk-pixbuf-devel-2.42.8-2.1 package on the GA media of openSUSE Tumbleweed.

This update for gdk-pixbuf fixes the following issues:

Update to version 2.42.8, including the following:

• CVE-2021-46829: Fixed a heap-based buffer overflow when compositing or clearing frames in GIF files (bsc#1201826).

This update for gdk-pixbuf fixes the following issues:

• CVE-2021-46829: Fixed overflow when compositing or clearing frames (bsc#1201826).

Pedro Ribeiro discovered that the GDK-PixBuf library did not properly handle certain GIF images. If an user or automated system were tricked into opening a specially crafted GIF file, a remote attacker could use this flaw to cause GDK-PixBuf to crash, resulting in a denial of service, or possibly execute arbitrary code.