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Fencer Intel
high 8.8

CVE-2018-14681 json

An issue was discovered in kwajd_read_headers in mspack/kwajd.c in libmspack before 0.7alpha.

published 8y ago modified 4mo ago also EUVD-2018-6575

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

An issue was discovered in kwajd_read_headers in mspack/kwajd.c in libmspack before 0.7alpha. Bad KWAJ file header extensions could cause a one or two byte overwrite.

Patch / fix

  • libmspack Debian 14, Debian 13, Debian 12 0.7-1

debian advisories DEBIAN-CVE-2018-14681

  • clamav Ubuntu 14.04 LTS 0.100.1+dfsg-1ubuntu0.14.04.3
  • libmspack Ubuntu 16.04 LTS 0.5-1ubuntu0.16.04.2
  • libmspack Ubuntu 18.04 LTS 0.6-3ubuntu0.1
  • libmspack Ubuntu Pro 14.04 LTS 0.4-1ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2018-14681

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libmspack RHEL 7 0.5-0.6.alpha.el7

red hat advisories RHSA-2018:3327

  • libmspack SLE Module for Basesystem 15 SP3, SLE Module for Basesystem 15 SP2, SLE Micro 5.0 0.6-3.11.1
  • libmspack SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 0.4-15.10.1
  • clamav SLES 12 SP3, SLES 12 SP2-BCL, SLED 12 SP3 +8 more 0.100.2-33.18.1
  • clamav SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 0.100.2-0.20.18.1
  • clamav SLE Module for Basesystem 15 0.100.2-3.6.4

suse advisories SUSE-SU-2021:2802-1SUSE-SU-2021:2765-1SUSE-SU-2018:3436-2SUSE-SU-2018:3441-1SUSE-SU-2018:3436-1SUSE-SU-2018:3250-1

  • libmspack openSUSE Leap 15.2 0.6-lp152.6.3.1
  • libmspack openSUSE Leap 15.3 0.6-3.11.1

opensuse advisories openSUSE-SU-2021:1200-1openSUSE-SU-2021:2802-1

  • clamav Alpine 3.24, Alpine 3.23, Alpine 3.22 +16 more 0.100.2-r0
  • libmspack Alpine 3.24, Alpine 3.23, Alpine 3.22 +17 more 0.7.1_alpha-r0

alpine advisories ALPINE-CVE-2018-14681

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2018-14681 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-14681 updated cvss 4.4

libmspack: out-of-bounds write in kwajd_read_headers in mspack/kwajd.c

  • Red Hat Enterprise Linux Client (v. 7) libmspack 0.5-0.6.alpha.el7 Red Hat Enterprise Linux Client Optional (v. 7) libmspack-devel 0.5-0.6.alpha.el7, libmspack-debuginfo 0.5-0.6.alpha.el7 Red Hat Enterprise Linux ComputeNode (v. 7) libmspack 0.5-0.6.alpha.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libmspack-devel 0.5-0.6.alpha.el7, libmspack-debuginfo 0.5-0.6.alpha.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) libmspack 0.5-0.6.alpha.el7 Red Hat Enterprise Linux Server (v. 7) libmspack 0.5-0.6.alpha.el7
    +3 more products
    Red Hat Enterprise Linux Server Optional (v. 7) libmspack 0.5-0.6.alpha.el7 Red Hat Enterprise Linux Workstation (v. 7) libmspack 0.5-0.6.alpha.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) libmspack-devel 0.5-0.6.alpha.el7, libmspack-debuginfo 0.5-0.6.alpha.el7
    fixed: vendor fix RHSA-2018:3327
  • Red Hat Enterprise Linux 8 libmspack
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.76% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel 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.