NULL pointer dereference in Freeware Advanced Audio Decoder - CVE-2021-32276

Vulnerability identifier: #VU63805

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-32276

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in get_sample() function in output.c. A remote attacker can trick the victim to open a specially crafted data and perform a denial of service (DoS) attack.

Freeware Advanced Audio Decoder
Debian Linux
Ubuntu
faad (Ubuntu package)
libfaad-dev (Ubuntu package)
libfaad2 (Ubuntu package)
faad2 (Debian package)

Install update from vendor's website.

Freeware Advanced Audio Decoder - update to 2.2.0
faad (Ubuntu package) - addressed in versions Ubuntu Pro, 2.9.1-1ubuntu0.1
libfaad-dev (Ubuntu package) - addressed in versions Ubuntu Pro, 2.9.1-1ubuntu0.1
libfaad2 (Ubuntu package) - addressed in versions Ubuntu Pro, 2.9.1-1ubuntu0.1
faad2 (Debian package) - update to 2.10.0-1~deb10u1

• https://github.com/knik0/faad2/issues/58
• https://lists.debian.org/debian-lts-announce/2021/10/msg00020.html
• https://www.debian.org/security/2022/dsa-5109

• Multiple vulnerabilities in Freeware Advanced Audio Decoder
• Debian update for faad2
• Ubuntu update for faad2