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CVE-2018-20198

Published: 18 December 2018

A NULL pointer dereference was discovered in ifilter_bank of libfaad/filtbank.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The vulnerability causes a segmentation fault and application crash, which leads to denial of service because adding to windowed output is mishandled in the LONG_START_SEQUENCE case.

From the Ubuntu Security Team

It was discovered that Freeware Advanced Audio Decoder 2 incorrectly handled implicit channel mapping reconfiguration when processing crafted AAC files. An attacker could possibly use this issue to cause a denial of service.

Notes

AuthorNote
danielwang
same underlying issue as CVE-2018-20362, same fix

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
faad2
Launchpad, Ubuntu, Debian
bionic Needed

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Not vulnerable
(2.8.8-3ubuntu3)
focal Not vulnerable
(2.8.8-3ubuntu3)
upstream Needs triage

xenial Needed

groovy Not vulnerable
(2.8.8-3ubuntu3)
jammy Not vulnerable
(2.8.8-3ubuntu3)
kinetic Not vulnerable
(2.8.8-3ubuntu3)
hirsute Not vulnerable
(2.8.8-3ubuntu3)
impish Not vulnerable
(2.8.8-3ubuntu3)
lunar Not vulnerable
(2.8.8-3ubuntu3)
trusty
Released (2.7-8+deb8u3build0.14.04.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
mantic Not vulnerable
(2.8.8-3ubuntu3)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H