Skip to content
Fencer Intel
high 8.8

CVE-2018-20548 json

There is an illegal WRITE memory access at common-image.c (function load_image) in libcaca 0.99.beta19 for 1bpp data.

published 7y ago modified 4mo ago also EUVD-2018-13102

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

There is an illegal WRITE memory access at common-image.c (function load_image) in libcaca 0.99.beta19 for 1bpp data.

Patch / fix

  • libcaca Debian 14, Debian 13, Debian 12 0.99.beta19-2.1

debian advisories DEBIAN-CVE-2018-20548

  • libcaca Ubuntu 14.04 LTS 0.99.beta18-1ubuntu5.1
  • libcaca Ubuntu 16.04 LTS 0.99.beta19-2ubuntu0.16.04.1
  • libcaca Ubuntu 18.04 LTS 0.99.beta19-2ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2018-20548

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libcaca SLES 12 SP5, SLES 12 SP4, SLED 12 SP4 +4 more 0.99.beta18-14.3.27
  • libcaca SLE Module for Server Applications 15 0.99.beta19.git20171003-3.3.7

suse advisories SUSE-SU-2019:2745-2SUSE-SU-2019:2745-1SUSE-SU-2019:0770-1

  • libcaca openSUSE Leap 15.0 0.99.beta19.git20171003-lp150.2.3.1

opensuse advisories openSUSE-SU-2019:1144-1

  • libcaca Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 0.99_beta19-r3

alpine advisories ALPINE-CVE-2018-20548

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2018-20548 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-20548 updated cvss 4.0

libcaca: out of bounds write in function load_image in common-image.c

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.81% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1652625 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.