CVE-2018-18584

libmspack: Out-of-bounds write in mspack/cab.h

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.

En mspack/cab.h en libmspack en versiones anteriores a la 0.8alpha y cabextract en versiones anteriores a la 1.8, el búfer de entrada de bloques CAB es un byte más pequeño para el bloque Quantum máximo, lo que conduce a una escritura fuera de límites.

USN-3814-1 fixed several vulnerabilities in libmspack. In Ubuntu 14.04 libmspack is included into ClamAV. This update provides the corresponding update for Ubuntu 14.04 LTS. It was discovered libmspack incorrectly handled certain malformed CAB files. A remote attacker could use this issue to cause libmspack to crash, resulting in a denial of service. Various other issues were also addressed.

*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

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

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

2018-10-22 CVE Reserved
2018-10-23 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (13)

URL	Tag	Source
https://bugs.debian.org/911640	Mailing List
https://lists.debian.org/debian-lts-announce/2018/10/msg00017.html	Mailing List
https://www.openwall.com/lists/oss-security/2018/10/22/1	Mailing List
https://www.starwindsoftware.com/security/sw-20181213-0001	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/kyz/libmspack/commit/40ef1b4093d77ad3a5cfcee1f5cb6108b3a3bcc2	2022-10-25

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2019:2049	2022-10-25
https://security.gentoo.org/glsa/201903-20	2022-10-25
https://usn.ubuntu.com/3814-1	2022-10-25
https://usn.ubuntu.com/3814-2	2022-10-25
https://usn.ubuntu.com/3814-3	2022-10-25
https://www.cabextract.org.uk/#changes	2022-10-25
https://access.redhat.com/security/cve/CVE-2018-18584	2019-08-06
https://bugzilla.redhat.com/show_bug.cgi?id=1644214	2019-08-06

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cabextract Project Search vendor "Cabextract Project"		Cabextract Search vendor "Cabextract Project" for product "Cabextract"				< 1.8 Search vendor "Cabextract Project" for product "Cabextract" and version " < 1.8"		-		Affected
Libmspack Project Search vendor "Libmspack Project"		Libmspack Search vendor "Libmspack Project" for product "Libmspack"				0.3 Search vendor "Libmspack Project" for product "Libmspack" and version "0.3"		alpha		Affected
Libmspack Project Search vendor "Libmspack Project"		Libmspack Search vendor "Libmspack Project" for product "Libmspack"				0.4 Search vendor "Libmspack Project" for product "Libmspack" and version "0.4"		alpha		Affected
Libmspack Project Search vendor "Libmspack Project"		Libmspack Search vendor "Libmspack Project" for product "Libmspack"				0.5 Search vendor "Libmspack Project" for product "Libmspack" and version "0.5"		alpha		Affected
Libmspack Project Search vendor "Libmspack Project"		Libmspack Search vendor "Libmspack Project" for product "Libmspack"				0.6 Search vendor "Libmspack Project" for product "Libmspack" and version "0.6"		alpha		Affected
Libmspack Project Search vendor "Libmspack Project"		Libmspack Search vendor "Libmspack Project" for product "Libmspack"				0.7 Search vendor "Libmspack Project" for product "Libmspack" and version "0.7"		alpha		Affected
Libmspack Project Search vendor "Libmspack Project"		Libmspack Search vendor "Libmspack Project" for product "Libmspack"				0.7.1 Search vendor "Libmspack Project" for product "Libmspack" and version "0.7.1"		alpha		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
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" 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
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
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.10"		-		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11"		sp3, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				12 Search vendor "Suse" for product "Linux Enterprise Server" and version "12"		ga, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				12 Search vendor "Suse" for product "Linux Enterprise Server" and version "12"		sp1, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				12 Search vendor "Suse" for product "Linux Enterprise Server" and version "12"		sp2, ltss		Affected
Starwindsoftware Search vendor "Starwindsoftware"		Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San"				-		vsphere		Affected