Critical severity · published Dec 25, 2024
CVE-2024-56431
oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift
9.8
CVSS
1.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TH
Theora · Xiph
before 1.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-56431
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-56431
Exploit
https://github.com/UnionTech-Software/libtheora-CVE-2024-56431-PoC
Product
https://github.com/xiph/theora/blob/7180717276af1ebc7da15c83162d6c5d6203aabf/lib/huffdec.c#L193
Issue Tracking
https://github.com/xiph/theora/issues/17#issuecomment-2480630603
www.openwall.com
https://www.openwall.com/lists/oss-security/2025/04/25/6
www.openwall.com
http://www.openwall.com/lists/oss-security/2025/04/25/4
www.openwall.com
http://www.openwall.com/lists/oss-security/2025/04/25/6
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