CVE-2020-13904 Information

Description

FFmpeg 4.2.3 has a use-after-free via a crafted EXTINF duration in an m3u8 file because parse_playlist in libavformat/hls.c frees a pointer and later that pointer is accessed in av_probe_input_format3 in libavformat/format.c.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

https://lists.debian.org/debian-lts-announce/2020/07/msg00022.html https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200529033905.41926-1-lq@chinaffmpeg.org/ https://security.gentoo.org/glsa/202007-58 https://trac.ffmpeg.org/ticket/8673 https://usn.ubuntu.com/4431-1/ https://www.debian.org/security/2020/dsa-4722

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5