CVE catalog

CVE-2018-18586

libmspack: CVE-2018-18586

Severity: Medium · CVSS 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Published: Oct 23, 2018, 2:29:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.28% · Oct 25, 2026

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

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libmspack	sid	`0.11-2`	fixed
Debian	libmspack	forky	`0.11-2`	fixed
Debian	libmspack	trixie	`0.11-1.1`	fixed
Debian	libmspack	bookworm	`0.11-1`	fixed
Suse	libmspack	linux enterprise software development kit 12 sp5	`0.4-15.13.1`	fixed
Suse	libmspack	linux enterprise server 12 sp5	`0.4-15.13.1`	fixed
Suse	libmspack	linux enterprise server for sap applications 12 sp5	`0.4-15.13.1`	fixed
Opensuse	libmspack	leap 15.3	`0.6-3.14.1`	fixed
Suse	libmspack	linux enterprise real time 15 sp2	`0.6-3.14.1`	fixed
Suse	libmspack	linux enterprise module for basesystem 15 sp3	`0.6-3.14.1`	fixed
Suse	libmspack	linux enterprise micro 5.0	`0.6-3.14.1`	fixed
Suse	libmspack	linux enterprise micro 5.1	`0.6-3.14.1`	fixed
Alpine	libmspack	3.10	`0.8_alpha-r0`	fixed
Alpine	libmspack	3.11	`0.8_alpha-r0`	fixed
Alpine	libmspack	3.6	`0.8_alpha-r0`	fixed
Alpine	libmspack	3.7	`0.8_alpha-r0`	fixed
Alpine	libmspack	3.8	`0.8_alpha-r0`	fixed
Alpine	libmspack	3.9	`0.8_alpha-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libmspack	source	sid	`0.8-1`	unimportant	Not reported	[911639]
Debian	libmspack	source	forky	`0.8-1`	unimportant	Not reported	[911639]
Debian	libmspack	source	trixie	`0.8-1`	unimportant	Not reported	[911639]
Debian	libmspack	source	bookworm	`0.8-1`	unimportant	Not reported	[911639]
Suse	libmspack	rpm	linux enterprise software development kit 12 sp5	`0.4-15.13.1`	Not reported	SUSE-SU-2022:4287-1	Not reported
Suse	libmspack	rpm	linux enterprise server 12 sp5	`0.4-15.13.1`	Not reported	SUSE-SU-2022:4287-1	Not reported
Suse	libmspack	rpm	linux enterprise server for sap applications 12 sp5	`0.4-15.13.1`	Not reported	SUSE-SU-2022:4287-1	Not reported
Opensuse	libmspack	rpm	leap 15.3	`0.6-3.14.1`	Not reported	OPENSUSE-SU-2022:0069-1	Not reported
Suse	libmspack	rpm	linux enterprise real time 15 sp2	`0.6-3.14.1`	Not reported	SUSE-SU-2022:0069-2	Not reported
Suse	libmspack	rpm	linux enterprise module for basesystem 15 sp3	`0.6-3.14.1`	Not reported	SUSE-SU-2022:0069-1	Not reported
Suse	libmspack	rpm	linux enterprise micro 5.0	`0.6-3.14.1`	Not reported	SUSE-SU-2022:0069-1	Not reported
Suse	libmspack	rpm	linux enterprise micro 5.1	`0.6-3.14.1`	Not reported	SUSE-SU-2022:0069-1	Not reported
Alpine	libmspack	apk	3.10	`0.8_alpha-r0`	Not reported	ALPINE-CVE-2018-18586	Not reported
Alpine	libmspack	apk	3.11	`0.8_alpha-r0`	Not reported	ALPINE-CVE-2018-18586	Not reported
Alpine	libmspack	apk	3.6	`0.8_alpha-r0`	Not reported	ALPINE-CVE-2018-18586	Not reported
Alpine	libmspack	apk	3.7	`0.8_alpha-r0`	Not reported	ALPINE-CVE-2018-18586	Not reported
Alpine	libmspack	apk	3.8	`0.8_alpha-r0`	Not reported	ALPINE-CVE-2018-18586	Not reported
Alpine	libmspack	apk	3.9	`0.8_alpha-r0`	Not reported	ALPINE-CVE-2018-18586	Not reported

[Debian bug #911639]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libmspack0]Unknown
Source package: [libmspack]
Details (2)
- 0.11-1 · amd64 · bookworm
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · bookworm; dsa · libmspack · debian · 12
- 0.11-1 · arm64 · bookworm
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · bookworm; dsa · libmspack · debian · 12
[libmspack-dev]Unknown
Source package: [libmspack]
Details (2)
- 0.11-1 · amd64 · bookworm
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · bookworm; dsa · libmspack · debian · 12
- 0.11-1 · arm64 · bookworm
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · bookworm; dsa · libmspack · debian · 12
[libmspack-doc]Unknown
Source package: [libmspack]
Details (2)
- 0.11-1 · all · bookworm
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · bookworm; dsa · libmspack · debian · 12
- 0.11-1 · all · bookworm
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · bookworm; dsa · libmspack · debian · 12

[Debian 13 (Trixie)]

[libmspack0t64]Unknown
Source package: [libmspack]
Details (2)
- 0.11-1.1+b1 · amd64 · trixie
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · 13
- 0.11-1.1+b1 · arm64 · trixie
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · 13
[libmspack-dev]Unknown
Source package: [libmspack]
Details (2)
- 0.11-1.1+b1 · amd64 · trixie
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · 13
- 0.11-1.1+b1 · arm64 · trixie
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · 13
[libmspack-doc]Unknown
Source package: [libmspack]
Details (2)
- 0.11-1.1 · all · trixie
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · 13
- 0.11-1.1 · all · trixie
  Fixed · Fixed: 0.8-1
  dsa · libmspack · debian · 13

Observed: Oct 23, 2026, 5:35:39 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]