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Fencer Vulns
medium 5.7

CVE-2020-27350 json

apt integer wraparound

published 2020-12-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-19862

cvss
5.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

APT had several integer overflows and underflows while parsing .deb packages, aka GHSL-2020-168 GHSL-2020-169, in files apt-pkg/contrib/extracttar.cc, apt-pkg/deb/debfile.cc, and apt-pkg/contrib/arfile.cc. This issue affects: apt 1.2.32ubuntu0 versions prior to 1.2.32ubuntu0.2; 1.6.12ubuntu0 versions prior to 1.6.12ubuntu0.2; 2.0.2ubuntu0 versions prior to 2.0.2ubuntu0.2; 2.1.10ubuntu0 versions prior to 2.1.10ubuntu0.1;

Patch / fix

  • Canonical apt 1.2.32ubuntu0.2, 1.6.12ubuntu0.2, 2.0.2ubuntu0.2, 2.1.10ubuntu0.1
  • apt Debian 14, Debian 13, Debian 12 2.1.13

debian advisories DEBIAN-CVE-2020-27350

  • apt Ubuntu 16.04 LTS 1.2.32ubuntu0.2
  • apt Ubuntu 18.04 LTS 1.6.12ubuntu0.2
  • apt Ubuntu 20.04 LTS 2.0.2ubuntu0.2
  • apt Ubuntu Pro 14.04 LTS 1.0.1ubuntu2.24+esm3

ubuntu advisories UBUNTU-CVE-2020-27350

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

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-2020-27350 updated cvss 5.7

apt: integer overflows and underflows while parsing .deb packages

  • 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

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
NVD 3.1 5.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Canonical apt

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns 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.