Bug 1644216 (CVE-2018-18586)

Summary:	CVE-2018-18586 libmspack: Directory traversal in chmextract.c
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dan, janfrode, jorti, ms, rdieter, rjones
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libmspack 0.8, cabextract 1.8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:41:11 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:	1648376
Bug Blocks:	1644217

Description Andrej Nemec 2018-10-30 09:27:28 UTC

** DISPUTED ** chmextract.c in the chmextract sample program, as distributed with libmspack before 0.8alpha, does not protect against absolute/relative pathnames in CHM files, leading to Directory Traversal. NOTE: the vendor disputes that this is a libmspack vulnerability, because chmextract.c was only intended as a source-code example, not a supported application.

Upstream patch:

https://github.com/kyz/libmspack/commit/7cadd489698be117c47efcadd742651594429e6d

References:

https://www.openwall.com/lists/oss-security/2018/10/22/1

Comment 1 Stefan Cornelius 2018-11-09 15:05:54 UTC

Statement:

This issue did not affect the versions of libmspack as shipped with Red Hat Enterprise Linux 7.