CVE-2018-14682

An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. There is an off-by-one error in the TOLOWER() macro for CHM decompression.

Published: 2018-07-28 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-14682 is rated High Risk (67.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.43%). EPSS rose +1.29% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-14682

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-27 3.14% 4.43% +1.29%
2 2026-02-11 3.30% 3.14% -0.16%
3 2025-12-28 — 3.30% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-14682

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2018-14682

OS Trackers for CVE-2018-14682

vendor priority summary link
alpine high CVE-2018-14682: 2 source package rows (clamav, libmspack); 19 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 19, open 0. https://security.alpinelinux.org/vuln/CVE-2018-14682
debian not yet assigned CVE-2018-14682 not yet assigned priority: Debian including 1 source packages (libmspack), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-14682
gentoo normal CVE-2018-14682: 1 GLSA(s) (201903-20), 2 atom(s) (app-arch/cabextract, dev-libs/libmspack); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-14682
redhat low — https://access.redhat.com/security/cve/CVE-2018-14682
suse low CVE-2018-14682 severity low: SUSE including 61 source package names (2.0.2-4.2.20:libmspack0-0.6-3.11.1, clamav-0.100.2-0.20.18.1, …), 140 product×package rows across 66 product lines (Container rancher/elemental-teal-iso/5.4, Container rancher/elemental-teal-rt/5.3, … (66 product lines)): Fixed 140. https://www.suse.com/security/cve/CVE-2018-14682/
ubuntu medium CVE-2018-14682 medium priority: Ubuntu including 2 source packages (clamav, libmspack), 28 status rows across 14 suites (bionic, cosmic, disco, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): not-affected 22, released 5, needs-triage 1. https://ubuntu.com/security/CVE-2018-14682

Affected software / configurations for CVE-2018-14682

Vendor Product Version Raw CPE
cabextract libmspack 0.0.20060920 cpe:2.3:a:cabextract:libmspack:0.0.20060920:alpha:*:*:*:*:*:*
cabextract libmspack 0.3 cpe:2.3:a:cabextract:libmspack:0.3:alpha:*:*:*:*:*:*
cabextract libmspack 0.4 cpe:2.3:a:cabextract:libmspack:0.4:alpha:*:*:*:*:*:*
cabextract libmspack 0.5 cpe:2.3:a:cabextract:libmspack:0.5:alpha:*:*:*:*:*:*
cabextract libmspack 0.6 cpe:2.3:a:cabextract:libmspack:0.6:alpha:*:*:*:*:*:*
cabextract_project cabextract <= 1.5 cpe:2.3:a:cabextract_project:cabextract:*:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
redhat ansible_tower 3.3 cpe:2.3:a:redhat:ansible_tower:3.3:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

References for CVE-2018-14682

URL Tags
http://www.openwall.com/lists/oss-security/2018/07/26/1 Mailing List Third Party Advisory
http://www.securitytracker.com/id/1041410 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:3327 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3505 Third Party Advisory
https://bugs.debian.org/904800 Issue Tracking Mailing List Patch Third Party Advisory
https://github.com/kyz/libmspack/commit/4fd9ccaa54e1aebde1e4b95fb0163b699fd7bcc8 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00007.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201903-20 Third Party Advisory
https://usn.ubuntu.com/3728-1/ Third Party Advisory
https://usn.ubuntu.com/3728-2/ Third Party Advisory
https://usn.ubuntu.com/3728-3/ Third Party Advisory
https://usn.ubuntu.com/3789-2/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4260 Third Party Advisory
cvelogic Threat Intelligence