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Fencer Vulns
high 7.5

CVE-2017-12938 json

UnRAR before 5.5.7 allows remote attackers to bypass a directory-traversal protection mechanism via vectors involving a symlink to the . di…

published 2017-08-18 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-4462

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

UnRAR before 5.5.7 allows remote attackers to bypass a directory-traversal protection mechanism via vectors involving a symlink to the . directory, a symlink to the .. directory, and a regular file.

Patch / fix

  • unrar-nonfree Debian 14, Debian 13, Debian 12 1:5.5.8-1

debian advisories DEBIAN-CVE-2017-12938

  • unrar SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +9 more 5.6.1-4.5.1
  • unrar SLES for SAP 11 SP4, SLES 11 SP4 5.6.1-5.3.1

suse advisories SUSE-SU-2021:2834-1SUSE-SU-2018:0862-1

Exploit prediction

3.05% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • seclists.org http://seclists.org/oss-sec/2017/q3/290 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.