PT-2019-19818 · Libav · Libav

Published 2019-09-19 · Updated 2021-07-21 · CVE-2019-9717

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Libav version 12.3

Description The issue allows attackers to cause a denial of service by consuming excessive CPU resources via a crafted video file in Matroska format. This is due to a complex format argument to sscanf in the srt to ass function within libavcodec/srtdec.c.

Recommendations For Libav version 12.3, consider restricting the use of the subtitle decoder to minimize the risk of exploitation until a patch is available.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2019-9717

Affected Products

Libav

References · 7

• 🔥 https://github.com/libav/libav/blob/df744e3cf66548c9167ea857104a29d2ea92819e/libavcodec/srtdec.c#L90 · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-9717 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-9717 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9717 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-9717 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-9717 · Security Note
• https://lgtm.com/security · Note