PT-2018-3815 · Freeware Advanced Audio Coder+2 · Faad2+2

Fantasy7082 · Published 2018-12-17 · Updated 2025-07-03 · CVE-2018-20199

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 Freeware Advanced Audio Decoder 2 (FAAD2) version 2.8.8

Description The issue is related to a NULL pointer dereference in the ifilter bank function of the libfaad/filtbank.c component of the Freeware Advanced Audio Decoder 2 (FAAD2) audio decoder. This can be exploited by a remote attacker to cause a denial of service, resulting in an application crash due to a segmentation fault. The crash occurs because adding to windowed output is mishandled in the ONLY LONG SEQUENCE case.

Recommendations For Freeware Advanced Audio Decoder 2 (FAAD2) version 2.8.8, consider disabling the ifilter bank function as a temporary workaround until a patch is available to prevent potential exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2021-1228

ALT-PU-2021-1316

ALT-PU-2021-1341

ALT-PU-2023-1579

BDU:2022-05696

CVE-2018-20199

DLA-1899-1

DLA-2792-1

DSA-5109-1

OPENSUSE-SU-2025:15214-1

Affected Products

Alt Linux

Astra Linux

Faad2

References · 34

• 🔥 https://github.com/knik0/faad2/issues/24 · Exploit
• https://debian.org/security/2022/dsa-5109 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-20199 · Vendor Advisory
• https://security.gentoo.org/glsa/202006-17 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-05696 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-20199 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20199 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-20199 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20230315SE81 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15214-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2018-20199 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-5109-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-20199 · Security Note
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2022-0819SE17 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20199 · Vendor Advisory