CVE-2018-14679

libmspack: off-by-one error in the CHM PMGI/PMGL chunk number validity checks

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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).

Se ha descubierto un problema en mspack/chmd.c en libmspack en versiones anteriores a la 0.7alpha. Hay un error por un paso en las comprobaciones de validez de los números de chunk de CHM PMGI/PMGL que podría conducir a una denegación de servicio (referencia de datos no inicializados y cierre inesperado de la aplicación).

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-07-28 CVE Reserved
2018-07-28 CVE Published
2024-02-21 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-193: Off-by-one Error

CAPEC

References (15)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2018/07/26/1	Mailing List
http://www.securitytracker.com/id/1041410	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00007.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://bugs.debian.org/904802	2021-04-26
https://github.com/kyz/libmspack/commit/72e70a921f0f07fee748aec2274b30784e1d312a	2021-04-26

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:3327	2021-04-26
https://access.redhat.com/errata/RHSA-2018:3505	2021-04-26
https://security.gentoo.org/glsa/201903-20	2021-04-26
https://usn.ubuntu.com/3728-1	2021-04-26
https://usn.ubuntu.com/3728-2	2021-04-26
https://usn.ubuntu.com/3728-3	2021-04-26
https://usn.ubuntu.com/3789-2	2021-04-26
https://www.debian.org/security/2018/dsa-4260	2021-04-26
https://access.redhat.com/security/cve/CVE-2018-14679	2018-10-30
https://bugzilla.redhat.com/show_bug.cgi?id=1610890	2018-10-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cabextract Search vendor "Cabextract"		Libmspack Search vendor "Cabextract" for product "Libmspack"				0.0.20060920 Search vendor "Cabextract" for product "Libmspack" and version "0.0.20060920"		alpha		Affected
Cabextract Search vendor "Cabextract"		Libmspack Search vendor "Cabextract" for product "Libmspack"				0.3 Search vendor "Cabextract" for product "Libmspack" and version "0.3"		alpha		Affected
Cabextract Search vendor "Cabextract"		Libmspack Search vendor "Cabextract" for product "Libmspack"				0.4 Search vendor "Cabextract" for product "Libmspack" and version "0.4"		alpha		Affected
Cabextract Search vendor "Cabextract"		Libmspack Search vendor "Cabextract" for product "Libmspack"				0.5 Search vendor "Cabextract" for product "Libmspack" and version "0.5"		alpha		Affected
Cabextract Search vendor "Cabextract"		Libmspack Search vendor "Cabextract" for product "Libmspack"				0.6 Search vendor "Cabextract" for product "Libmspack" and version "0.6"		alpha		Affected
Cabextract Project Search vendor "Cabextract Project"		Cabextract Search vendor "Cabextract Project" for product "Cabextract"				<= 1.5 Search vendor "Cabextract Project" for product "Cabextract" and version " <= 1.5"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Redhat Search vendor "Redhat"		Ansible Tower Search vendor "Redhat" for product "Ansible Tower"				3.3 Search vendor "Redhat" for product "Ansible Tower" and version "3.3"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		esm		Affected