Out-of-bounds read in ffmpeg.sourceforge.net FFmpeg

1) Out-of-bounds read

EUVDB-ID: #VU32005

Risk: High

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-13305

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.

In FFmpeg 4.0.1, due to a missing check for negative values of the mquant variable, the vc1_put_blocks_clamped function in libavcodec/vc1_block.c may trigger an out-of-array access while converting a crafted AVI file to MPEG4, leading to an information disclosure or a denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FFmpeg: 0.29

CPE2.3

• cpe:2.3:a:ffmpeg_sourceforge_net:ffmpeg:0.29:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2020-01/msg00012.html
https://github.com/FFmpeg/FFmpeg/commit/d08d4a8c7387e758d439b0592782e4cfa2b4d6a4

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.