Path Traversal in Kyzer Libmspack

CVE-2018-18586

chmextract.c in the chmextract sample program, as distributed with libmspack before 0.8alpha, does not protect against absolute/relative pathnames in CHM files, leading to Directory Traversal. NOTE: the vendor disputes that this is a libmspack vulnerability, because chmextract.c was only intended as a source-code example, not a supported application

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.033 (87.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

References

  • cve@mitre.org (Exploit, x_refsource_MISC, Vendor Advisory)
  • cve@mitre.org (Mailing List, Third Party Advisory, x_refsource_MISC)
  • cve@mitre.org (Mailing List, Third Party Advisory, x_refsource_MISC)
  • cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)

Frequently asked questions

What is CVE-2018-18586?
CVE-2018-18586 is a medium-severity vulnerability in Kyzer Libmspack, classified under Path Traversal. CVSS score: 5.3/10. Published 2018-10-23.
How severe is CVE-2018-18586?
Medium severity. CVSS v3 base score is 5.3 out of 10.