CVE-2019-9721 — Out-of-bounds Read in Ffmpeg

CWE-125 — Out-of-bounds ReadCWE-400 — Uncontrolled Resource Consumption8 documents8 sources
Severity
6.5MEDIUMNVD
EPSS
0.5%
top 33.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
FfmpegDebian FfmpegCanonical Ubuntu Linux
Timeline
PublishedMar 12
Latest updateNov 2

Description

A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format, because handle_open_brace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages3 packages

▶debiandebian/ffmpeg< ffmpeg 7:4.1.3-1 (bookworm)
▶Debianffmpeg/ffmpeg< 7:4.1.3-1+3
▶NVDffmpeg/ffmpeg3.2, 4.1+1

Also affects: Ubuntu Linux 18.04, 18.10, 19.04

Patches

Patch: git.ffmpeg.org ↗Patch: github.com ↗Patch: git.ffmpeg.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-hjv9-2v6w-8wp3: A denial of service in the subtitle decoder in FFmpeg 3↗2022-05-13
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OSV
CVE-2019-9721: A denial of service in the subtitle decoder in FFmpeg 3↗2019-03-12
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📋Vendor Advisories

3
Ubuntu
FFmpeg vulnerabilities↗2019-05-06
▶
Red Hat
ffmpeg: complex format argument in handle_open_brace in libavcodec/htmlsubtitles.c causing denial of service↗2019-03-12
▶
Debian
CVE-2019-9721: ffmpeg - A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attacke...↗2019
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📄Research Papers

1
arXiv
VFCFinder: Seamlessly Pairing Security Advisories and Patches↗2023-11-02
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💬Community

1
Bugzilla
CVE-2019-9721 ffmpeg: complex format argument in handle_open_brace in libavcodec/htmlsubtitles.c causing denial of service↗2019-05-09
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