Vulnerability · Published Dec 25, 2024 · Assigned by mitre
CVE-2024-56431
Critical 9.8
In plain English
A critical-severity incorrect authorization in the libtheora package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | libtheora | 1.2.0~alpha1+dfsg-6 | DEBIAN-CVE-2024-56431 |
| Debian:14 | libtheora | 1.2.0~alpha1+dfsg-6 | DEBIAN-CVE-2024-56431 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/xiph/theora/issues/17#issuecomment-2480630603
- https://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193
- https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC
- https://www.openwall.com/lists/oss-security/2025/04/25/6
- http://www.openwall.com/lists/oss-security/2025/04/25/4
- http://www.openwall.com/lists/oss-security/2025/04/25/6