Vulnerability identifier: #VU66184

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-46829

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gnome gdk-pixbuf
Universal components / Libraries / Libraries used by multiple products

Vendor: Gnome Development Team

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing GIF images. A remote attacker can create a specially crafted GIF image, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gnome gdk-pixbuf: 2.0.0 - 2.90.3

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.