CVE-2018-14679: Cabextract Libmspack

Medium severity, CVSS 6.5. EPSS: 3.3% chance of exploitation in the next 30 days.

An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. There is an off-by-one error in the CHM PMGI/PMGL chunk number validity checks, which could lead to denial of service (uninitialized data dereference and application crash).

Affected products

• Cabextract Libmspack: version 0.0.20060920 only; version 0.3 only; version 0.4 only; version 0.5 only; version 0.6 only
• Cabextract Project Cabextract: up to and including 1.5
• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 18.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Red Hat Ansible Tower: version 3.3 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2018-07-28. Last modified 2026-06-17.