Bug 1180177 (CVE-2015-4468, CVE-2015-4469)

Summary:	CVE-2015-4468 CVE-2015-4468 libmspack: pointer arithmetic overflow during CHM decompression
Product:	[Other] Security Response	Reporter:	Vasyl Kaigorodov <vkaigoro>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	carnil, dan, pertusus
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:37:33 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:	1180180, 1180181
Bug Blocks:

Description Vasyl Kaigorodov 2015-01-08 14:59:05 UTC

It was reported [1] that libmspack has three pointer arithmetic overflow issues, which can later cause buffer over-read.

Two sample CHM files that trigger segfaults, which are caused by the overflows, can be found at [1].

Proposed patch to fix this issue is attached.

As per the report, only 32-bit architecture if affected.

[1]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=774726

Comment 1 Vasyl Kaigorodov 2015-01-08 14:59:47 UTC

Created libmspack tracking bugs for this issue:

Affects: fedora-all [bug 1180180]
Affects: epel-all [bug 1180181]

Comment 2 Fedora Update System 2015-03-13 17:00:34 UTC

libmspack-0.5-0.1.alpha.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2015-03-13 17:02:11 UTC

libmspack-0.5-0.1.alpha.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2015-03-13 17:14:33 UTC

libmspack-0.5-0.1.alpha.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2015-03-25 20:04:24 UTC

libmspack-0.5-0.1.alpha.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2015-03-25 20:04:55 UTC

libmspack-0.5-0.1.alpha.el7 has been pushed to the Fedora EPEL 7 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Vasyl Kaigorodov 2015-06-11 14:54:34 UTC

CVE assigned: http://seclists.org/oss-sec/2015/q2/691

Comment 8 Product Security DevOps Team 2019-06-08 02:37:33 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.