PT-2019-19819 · FFmpeg · Libav

Published 2019-09-19 · Updated 2024-08-04 · CVE-2019-9719

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Libav version 12.3

Description A stack-based buffer overflow issue exists in the subtitle decoder of Libav, potentially allowing attackers to corrupt the stack via a crafted video file in Matroska format. This issue arises from the misuse of snprintf in the srt to ass function within libavcodec/srtdec.c. However, it is noted that some third parties dispute the existence of this issue, citing a lack of evidence and the basis being a generic warning from static code analysis.

Recommendations For Libav version 12.3, at the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2019-9719

Affected Products

Libav

References · 9

• 🔥 https://github.com/libav/libav/blob/df744e3cf66548c9167ea857104a29d2ea92819e/libavcodec/srtdec.c#L113 · Exploit
• 🔥 https://lgtm.com/projects/g/libav/libav/snapshot/f5f553ca3bdca0c97dd08bbf002f0d8cb193788b/files/libavcodec/srtdec.c?sort=name&dir=ASC&mode=heatmap#xeec693aa6d85853b:1 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-9719 · Security Note
• https://osv.dev/vulnerability/CVE-2019-9719 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-9719 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9719 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-9719 · Security Note
• https://github.com/libav/libav/commits/master/libavcodec/srtdec.c · Note
• https://lgtm.com/security · Note