Heap-based buffer overflow in FFmpeg - CVE-2020-12284

Vulnerability identifier: #VU27385

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-12284

CWE-ID: CWE-122

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in "cbs_jpeg_split_fragment" in "libavcodec/cbs_jpeg.c" file during "JPEG_MARKER_SOS" handling. A remote attacker can trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

FFmpeg
Gentoo Linux
Ubuntu
ffmpeg (Alpine package)
ffmpeg (Debian package)
libavdevice58 (Ubuntu package)
libpostproc55 (Ubuntu package)
libavcodec58 (Ubuntu package)
libavfilter7 (Ubuntu package)
ffmpeg (Ubuntu package)
libavcodec-extra58 (Ubuntu package)
libswscale5 (Ubuntu package)
libavfilter-extra7 (Ubuntu package)
libavutil56 (Ubuntu package)
libswresample3 (Ubuntu package)
libavresample4 (Ubuntu package)
libavformat58 (Ubuntu package)

Install update from vendor's website.

FFmpeg - update to 4.3
ffmpeg (Alpine package) - addressed in versions 4.1.6-r0, 4.2.4-r0
ffmpeg (Debian package) - update to 7:4.1.6-1~deb10u1
libavdevice58 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libpostproc55 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libavcodec58 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libavfilter7 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
ffmpeg (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libavcodec-extra58 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libswscale5 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libavfilter-extra7 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libavutil56 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libswresample3 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libavresample4 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1
libavformat58 (Ubuntu package) - update to 7:4.2.4-1ubuntu0.1

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19734
• https://github.com/FFmpeg/FFmpeg/commit/1812352d767ccf5431aa440123e2e260a4db2726

• Heap-based buffer overflow in FFmpeg
• Debian update for ffmpeg
• Gentoo update for FFmpeg
• Heap-based buffer overflow in ffmpeg (Alpine package)
• Ubuntu update for ffmpeg