CVE-2018-20546: canonical ubuntu_linux Integer Overflow or Wraparound
CVSS: 8.1v3.1HighModified
AliasesUBUNTU-CVE-2018-20546DEBIAN-CVE-2018-20546
Published 28-12-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-20546 is a high (CVSS 8.1) Integer Overflow or Wraparound vulnerability in canonical ubuntu_linux. EPSS estimates a 2.31% chance of exploitation in the next 30 days, higher than 83.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
2.31%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 28-12-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.
CVSS metrics
5 scores · 3 sources · 3 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
High 8.1Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:HSourcesSingle source
Medium 5.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.31%
Chance of exploitation in the next 30 days
Percentile
83%
Versus all other CVEs
30-day change
0.00 pp
From 2.31% on 19-09-2026
19-09-202619-10-2026
EPSS score2.31%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugzilla.redhat.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian2 products
- libcaca< 0.99.beta19-2.1
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04 | 18.10
Fedoraproject1 product
- fedoraEOL34 | 35 | 36
Libcaca_project1 product
- libcaca0.99:beta19
Opensuse1 product
- leapEOL15.0
Ubuntu1 product
- libcaca< 0.99.beta18-1ubuntu5.1 | < 0.99.beta19-2ubuntu0.16.04.1 | < 0.99.beta19-2ubuntu0.18.04.1
6 vendors · 7 products
References
15 links- bugzilla.redhat.com/show_bug.cgi?id=1652622X Refsource MISCExploitIssue TrackingPatchThird Party AdvisoryREPORT
lists.debian.org/debian-lts-announce/2019/01/msg00007.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.opensuse.org/opensuse-security-announce/2019-04/msg00033.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05X Refsource MISCPatchThird Party Advisory