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Fencer Intel
high 7.8

CVE-2017-6419 json

mspack/lzxd.c in libmspack 0.5alpha, as used in ClamAV 0.99.2, allows remote attackers to cause a denial of service (heap-based buffer over…

published 2017-08-07 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-15476

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

mspack/lzxd.c in libmspack 0.5alpha, as used in ClamAV 0.99.2, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted CHM file.

Patch / fix

  • clamav Debian 14, Debian 13, Debian 12 0.99.3~beta1+dfsg-1
  • libmspack Debian 14, Debian 13, Debian 12 0.6-1

debian advisories DEBIAN-CVE-2017-6419

  • clamav Ubuntu 14.04 LTS 0.99.2+addedllvm-0ubuntu0.14.04.2
  • libmspack Ubuntu 16.04 LTS 0.5-1ubuntu0.16.04.1
  • libmspack Ubuntu Pro 14.04 LTS 0.4-1ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2017-6419

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

  • clamav SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 0.99.4-0.20.7.2
  • clamav SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +4 more 0.99.4-33.9.1
  • clamav SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for SAP 12 SP1 +9 more 0.99.3-33.5.1
  • clamav SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 0.99.3-0.20.3.2

suse advisories SUSE-SU-2018:0863-1SUSE-SU-2018:0809-1SUSE-SU-2018:0255-1SUSE-SU-2018:0254-1

  • clamav openSUSE Tumbleweed 0.103.3-1.4

opensuse advisories openSUSE-SU-2024:10685-1

  • clamav Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 0.99.4-r0
  • libmspack Alpine 3.24, Alpine 3.23, Alpine 3.22 +19 more 0.5_alpha-r1

alpine advisories ALPINE-CVE-2017-6419

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

  • clamav Arch Linux 0.99.4-1
  • libmspack Arch Linux 1:0.6alpha-1

arch linux advisories AVG-602AVG-603

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-2017-6419 updated cvss 6.5

clamav: heap-based buffer overflow in mspack/lzxd.c

  • Red Hat Enterprise Linux 7 libmspack
    affected: no fix planned “Will not fix”

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

1.98% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/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
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.