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Fencer Vulns
medium 5.5

CVE-2017-14121 json

The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered…

published 2017-09-03 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-5633

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.

Patch / fix

  • unrar-free Debian 14, Debian 13, Debian 12 1:0.0.1+cvs20140707-4

debian advisories DEBIAN-CVE-2017-14121

  • unrar-free Ubuntu 16.04 LTS 1:0.0.1+cvs20140707-4~build0.16.04.1
  • unrar-free Ubuntu Pro 14.04 LTS 1:0.0.1+cvs20071127-2+deb7u1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2017-14121

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

Exploit prediction

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

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.