CVE-2018-20199: audiocoding freeware_advanced_audio_decoder_2 NULL Pointer Dereference
Vulnerability summary
CVE-2018-20199 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in audiocoding freeware_advanced_audio_decoder_2. EPSS estimates a 1.13% chance of exploitation in the next 30 days, higher than 65.8% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 4 · Related 1Timeline
- 18-12-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
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 ONLY_LONG_SEQUENCE case.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.13%
Chance of exploitation in the next 30 days
Percentile
66%
Versus all other CVEs
30-day change
0.00 pp
From 1.13% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundFaad2
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian2 products
- faad2< 2.8.8-3.1
- debian_linuxEOL8.0 | 9.0 | 10.0
Alpine1 product
- faad2< 2.9.0-r0
Audiocoding1 product
Ubuntu1 product
- faad2< 2.7-8+deb8u3build0.14.04.1~esm1 | All versions (No fix recorded)
4 vendors · 5 products
References
9 links
lists.debian.org/debian-lts-announce/2019/08/msg00033.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2021/10/msg00020.htmlMailing ListX Refsource MLISTThird Party Advisory