CVE-2020-13904 Use after free in n/a

What is CVE-2020-13904?

CVE-2020-13904 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 7 Jun 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

FFmpeg 2.8 and 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.

Weakness: CWE-416

Which versions are affected by CVE-2020-13904?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Ffmpeg Ffmpeg.

How do I fix CVE-2020-13904?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2020-13904 being exploited?

There is no known exploitation of CVE-2020-13904 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2024-AE31079, DEBIAN-CVE-2020-13904, GHSA-8gvr-7h6w-q2cv, UBUNTU-CVE-2020-13904.