The read_header function in libavcodec/ffv1dec.c in FFmpeg before 2.1 does not properly enforce certain bit-count and colorspace constraint…

published 2013-12-09 12y ago modified 2026-06-17 4mo ago also EUVD-2013-6821

cvss: 6.8; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

The read_header function in libavcodec/ffv1dec.c in FFmpeg before 2.1 does not properly enforce certain bit-count and colorspace constraints, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted FFV1 data.

Patch / fix

distros 1 links 3

ffmpeg Debian 14, Debian 13, Debian 12 7:2.4.1-1

debian advisories DEBIAN-CVE-2013-7020

github.com/FFmpeg/FFmpeg@b05cd1e commit
openwall.com/lists/oss-security/2013/12/08/3 advisory
openwall.com/lists/oss-security/2013/11/26/7 advisory

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Exploit prediction

1.68% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com /FFmpeg/FFmpeg/commit/b05cd1ea7e45a836f7f6071a716c38bb30326e0f
issue-tracking, patch
openwall.com /lists/oss-security/2013/12/08/3
mailing-list, patch, third-party-advisory
openwall.com /lists/oss-security/2013/11/26/7
mailing-list, patch, third-party-advisory
debian.org /security/2014/dsa-3027
vendor-advisory, third-party-advisory
mandriva.com /security/advisories?name=MDVSA-2014:227
vendor-advisory, broken-link
security.gentoo.org /glsa/201603-06
vendor-advisory
ffmpeg.org /security.html
vendor-advisory
secunia.com /advisories/61389
third-party-advisory

Sources

CVE List CVE-2013-7020
NVD CVE-2013-7020

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