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Fencer Vulns
medium 5.5

CVE-2018-21269 json

checkpath in OpenRC through 0.42.1 might allow local users to take ownership of arbitrary files because a non-terminal path component can b…

published 2020-10-27 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13783

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

checkpath in OpenRC through 0.42.1 might allow local users to take ownership of arbitrary files because a non-terminal path component can be a symlink.

Patch / fix

  • openrc Debian 14, Debian 13, Debian 12 0.45.2-1

debian advisories DEBIAN-CVE-2018-21269

  • openrc Alpine 3.10 0.41.2-r2
  • openrc Alpine 3.11 0.42.1-r3
  • openrc Alpine 3.12 0.42.1-r12
  • openrc Alpine 3.13 0.42.1-r20

alpine advisories ALPINE-CVE-2018-21269

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

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/OpenRC/openrc/issues/201 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

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.