PT-2021-10243 · Libav · Libav

Published 2021-08-23 · Updated 2021-08-31 · CVE-2020-18776

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Libav version 12.3

Description: The issue is related to a segmentation fault in the vc1 decode b mb intfr function in vc1 block.c, which can be triggered by an attacker using a crafted file, resulting in a denial-of-service.

Recommendations: For Libav version 12.3, consider disabling the vc1 decode b mb intfr function as a temporary workaround until a patch is available. Restrict access to crafted files to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2020-18776

Affected Products

Libav

References · 8

• 🔥 https://bugzilla.libav.org/show_bug.cgi?id=1153 · Exploit
• https://ubuntu.com/security/CVE-2020-18776 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-18776 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-18776 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-18776 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-18776 · Security Note
• https://t.me/cibsecurity/27747 · Telegram Post
• https://t.me/cvenotify/19960 · Telegram Post