CVE-2018-7557: debian debian_linux Out-of-bounds Read
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2018-7557DEBIAN-CVE-2018-7557
Published 28-02-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-7557 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 1.89% chance of exploitation in the next 30 days, higher than 79.1% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.89%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3Timeline
- 28-02-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The decode_init function in libavcodec/utvideodec.c in FFmpeg 2.8 through 3.4.2 allows remote attackers to cause a denial of service (Out of array read) via an AVI file with crafted dimensions within chroma subsampling data.
CVSS metrics
5 scores · 3 sources · 3 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Medium 6.5Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.89%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
+0.01 pp
From 1.88% on 18-09-2026
18-09-202618-10-2026
EPSS score1.89%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- ffmpeg< 7:3.4.3-1
- debian_linuxEOL8.0 | 9.0
Ffmpeg1 product
- ffmpeg≥ 2.8, ≤ 3.4.2
Ubuntu1 product
- ffmpeg< 7:2.8.15-0ubuntu0.16.04.1 | < 7:3.4.4-0ubuntu0.18.04.1
3 vendors · 4 products
References
8 links- git.ffmpeg.org/gitweb/ffmpeg.git/commit/7414d0bda7763f9bd69c26c068e482ab297c1c96X Refsource CONFIRMPatchVendor AdvisoryREPORT
- lists.debian.org/debian-lts-announce/2019/01/msg00006.htmlMailing ListX Refsource MLISTThird Party Advisory
- github.com/FFmpeg/FFmpeg/commit/e724bd1dd9efea3abb8586d6644ec07694afceaeX Refsource MISCPatchThird Party Advisory