Bug 1610890 (CVE-2018-14679)

Summary:	CVE-2018-14679 libmspack: off-by-one error in the CHM PMGI/PMGL chunk number validity checks
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	cavery, dan, jen, lpardo, rjones
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libmspack 0.7alpha	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:34:48 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1610891, 1610893, 1610932, 1611550
Bug Blocks:	1610945

Description Laura Pardo 2018-08-01 14:46:29 UTC

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)


References:
http://openwall.com/lists/oss-security/2018/07/28/1
https://bugs.debian.org/904802

Upstream patch:
https://github.com/kyz/libmspack/commit/72e70a921f0f07fee748aec2274b30784e1d312a

Comment 1 Laura Pardo 2018-08-01 14:46:53 UTC

Created libmspack tracking bugs for this issue:

Affects: fedora-all [bug 1610891]

Comment 4 Laura Pardo 2018-08-01 16:25:49 UTC

Created libmspack tracking bugs for this issue:

Affects: epel-all [bug 1610932]

Comment 6 Stefan Cornelius 2018-08-02 10:38:53 UTC

Statement:

This issue affects the versions of libmspack as shipped with Red Hat Enterprise Linux 7.

Comment 8 errata-xmlrpc 2018-10-30 07:59:36 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3327 https://access.redhat.com/errata/RHSA-2018:3327