CVE-2018-14679· NVD / CVE Program· CNA mitre

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

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).

MediumCVSS 6.5 · v3.0—No exploit Fix available

Published: Jul 28, 2018
Updated: Jun 16, 2026
EPSS: 3.3% · 88th percentile
CWE: CWE-193

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Action score

Monitor

Low priority for now.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 3.3%

Affected systems

Vendor	Product	CPE
cabextract	libmspack	cpe:2.3:a:cabextract:libmspack
cabextract project	cabextract	cpe:2.3:a:cabextract_project:cabextract
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux
debian	debian linux	cpe:2.3:o:debian:debian_linux
redhat	ansible tower	cpe:2.3:a:redhat:ansible_tower
redhat	enterprise linux desktop	cpe:2.3:o:redhat:enterprise_linux_desktop
redhat	enterprise linux server	cpe:2.3:o:redhat:enterprise_linux_server
redhat	enterprise linux workstation	cpe:2.3:o:redhat:enterprise_linux_workstation

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

cabextract libmspack0.0.20060920
cabextract libmspack0.3
cabextract libmspack0.4
cabextract libmspack0.5
cabextract libmspack0.6
cabextract project cabextractup to 1.5 inclusive
canonical ubuntu linux12.04
canonical ubuntu linux14.04
canonical ubuntu linux16.04
canonical ubuntu linux18.04
debian debian linux8.0
debian debian linux9.0
redhat ansible tower3.3
redhat enterprise linux desktop7.0
redhat enterprise linux server7.0
redhat enterprise linux workstation7.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.10	libmspack	before 0.7.1_alpha-r0	0.7.1_alpha-r0
Debian:12	libmspack	before 0.7-1	0.7-1
Debian:8	libmspack	before 0.5-1+deb8u2	0.5-1+deb8u2
Debian:9	libmspack	before 0.5-1+deb9u2	0.5-1+deb9u2
openSUSE:Leap 15.2	libmspack	before 0.6-lp152.6.3.1	0.6-lp152.6.3.1
openSUSE:Leap 15.3	libmspack	before 0.6-3.11.1	0.6-3.11.1
openSUSE:Tumbleweed	clamav	before 1.4.2-1.1	1.4.2-1.1
Red Hat:enterprise_linux:7::client	libmspack	before 0:0.5-0.6.alpha.el7	0:0.5-0.6.alpha.el7
Red Hat:enterprise_linux:7::client	libmspack-debuginfo	before 0:0.5-0.6.alpha.el7	0:0.5-0.6.alpha.el7
Red Hat:enterprise_linux:7::client	libmspack-devel	before 0:0.5-0.6.alpha.el7	0:0.5-0.6.alpha.el7
SUSE:HPE Helion OpenStack 8	clamav	before 0.103.4-33.41.1	0.103.4-33.41.1
SUSE:Linux Enterprise Micro 5.5	clamav	before 1.4.2-150200.8.3.1	1.4.2-150200.8.3.1
SUSE:Linux Enterprise Module for Basesystem 15 SP2	libmspack	before 0.6-3.11.1	0.6-3.11.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6	clamav	before 1.4.2-150600.18.6.1	1.4.2-150600.18.6.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6	clamav	before 1.4.2-150600.18.6.1	1.4.2-150600.18.6.1
SUSE:Linux Enterprise Point of Sale 11 SP3	clamav	before 0.103.4-0.20.41.1	0.103.4-0.20.41.1
SUSE:Linux Enterprise Server 11-SECURITY	clamav-openssl1	before 0.103.4-0.20.41.1	0.103.4-0.20.41.1
SUSE:Linux Enterprise Server 12 SP5	clamav	before 0.103.4-3.12.1	0.103.4-3.12.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	clamav	before 1.4.2-3.36.1	1.4.2-3.36.1
SUSE:OpenStack Cloud 7	clamav	before 0.100.1-33.15.2	0.100.1-33.15.2

Same product

cabextract: all records

Other highest-scoring records for the same primary product.

CVE-2018-14682An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
36Monitor
CVE-2018-14681An issue was discovered in kwajd_read_headers in mspack/kwajd.c in libmspack before 0.7alpha.
36Monitor
CVE-2018-14680An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha.
27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:libmspack	0.7.1_alpha-r0 · Alpine:v3.10	Package registry (OSV)
debian:libmspack	0.7-1 · Debian:12	Package registry (OSV)
opensuse:clamav	1.4.2-150600.18.6.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:libmspack	0.6-lp152.6.3.1 · openSUSE:Leap 15.2	Package registry (OSV)
red hat:libmspack	0:0.5-0.6.alpha.el7 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:libmspack-debuginfo	0:0.5-0.6.alpha.el7 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
red hat:libmspack-devel	0:0.5-0.6.alpha.el7 · Red Hat:enterprise_linux:7::client	Package registry (OSV)
suse:clamav	0.100.1-33.15.2 · SUSE:OpenStack Cloud 7	Package registry (OSV)
suse:clamav	1.4.2-150600.18.6.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6	Package registry (OSV)
suse:clamav-openssl1	0.103.4-0.20.41.1 · SUSE:Linux Enterprise Server 11-SECURITY	Package registry (OSV)
suse:libmspack	0.6-3.11.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP2	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

kyz/libmspackcommit 72e70a9

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-193 · Off-by-one Error

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records