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Fencer Vulns
medium 5.5

CVE-2019-1010305 json

libmspack 0.9.1alpha is affected by: Buffer Overflow.

published 2019-07-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-2041

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

libmspack 0.9.1alpha is affected by: Buffer Overflow. The impact is: Information Disclosure. The component is: function chmd_read_headers() in libmspack(file libmspack/mspack/chmd.c). The attack vector is: the victim must open a specially crafted chm file. The fixed version is: after commit 2f084136cfe0d05e5bf5703f3e83c6d955234b4d.

Patch / fix

  • libmspack Debian 14, Debian 13, Debian 12 0.10.1-1

debian advisories DEBIAN-CVE-2019-1010305

  • libmspack Ubuntu 16.04 LTS 0.5-1ubuntu0.16.04.4
  • libmspack Ubuntu 18.04 LTS 0.6-3ubuntu0.3
  • libmspack Ubuntu 20.04 LTS 0.10.1-1
  • clamav Ubuntu Pro 14.04 LTS 0.100.3+dfsg-0ubuntu0.14.04.1+esm1
  • libmspack Ubuntu Pro 14.04 LTS 0.4-1ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2019-1010305

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 0.5-0.8.alpha.el7
  • libmspack RHEL 8 0.7-0.3.alpha.el8.4

red hat advisories RHSA-2020:3848RHSA-2020:1686

  • libmspack SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 0.4-15.7.1
  • libmspack SLE Module for Basesystem 15 SP1 0.6-3.8.19

suse advisories SUSE-SU-2020:2711-1SUSE-SU-2020:1493-1

  • libmspack openSUSE Leap 15.1 0.6-lp151.4.3.1

opensuse advisories openSUSE-SU-2020:0746-1

  • libmspack AlmaLinux 8 0.7-0.3.alpha.el8.4

almalinux advisories ALSA-2020:1686

  • libmspack Rocky Linux 8 0.7-0.3.alpha.el8.4

rocky linux advisories RLSA-2020:1686

  • libmspack Alpine 3.10, Alpine 3.9, Alpine 3.8 0.8_alpha-r1
  • libmspack Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 0.10.1_alpha-r0

alpine advisories ALPINE-CVE-2019-1010305

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

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-2019-1010305 updated cvss 2.5

libmspack: buffer overflow in function chmd_read_headers()

  • Red Hat CodeReady Linux Builder (v. 8) libmspack 0.7-0.3.alpha.el8.4 Red Hat Enterprise Linux AppStream (v. 8) libmspack 0.7-0.3.alpha.el8.4
    fixed: vendor fix RHSA-2020:1686
  • Red Hat Enterprise Linux Client (v. 7) libmspack 0.5-0.8.alpha.el7 Red Hat Enterprise Linux Client Optional (v. 7) libmspack-devel 0.5-0.8.alpha.el7, libmspack-debuginfo 0.5-0.8.alpha.el7 Red Hat Enterprise Linux ComputeNode (v. 7) libmspack 0.5-0.8.alpha.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libmspack-devel 0.5-0.8.alpha.el7, libmspack-debuginfo 0.5-0.8.alpha.el7 Red Hat Enterprise Linux Server (v. 7) libmspack 0.5-0.8.alpha.el7 Red Hat Enterprise Linux Server Optional (v. 7) libmspack 0.5-0.8.alpha.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) libmspack 0.5-0.8.alpha.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) libmspack-devel 0.5-0.8.alpha.el7, libmspack-debuginfo 0.5-0.8.alpha.el7
    fixed: vendor fix RHSA-2020:3848

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

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/kyz/libmspack/issues/27 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • libmspack libmspack

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns 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.