Bug 1644215 (CVE-2018-18585)

Summary:	CVE-2018-18585 libmspack: chmd_read_headers() fails to reject filenames containing NULL bytes
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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:	2019-08-06 19:19:56 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:	1644218, 1644219, 1644220, 1644221, 1644222, 1648385
Bug Blocks:	1644217

Description Andrej Nemec 2018-10-30 09:25:45 UTC

chmd_read_headers in mspack/chmd.c in libmspack before 0.8alpha accepts a filename that has '\0' as its first or second character (such as the "/\0" name).

Upstream patch:

https://github.com/kyz/libmspack/commit/8759da8db6ec9e866cb8eb143313f397f925bb4f

References:

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

Comment 1 Andrej Nemec 2018-10-30 09:29:54 UTC

Created cabextract tracking bugs for this issue:

Affects: epel-all [bug 1644222]
Affects: fedora-all [bug 1644221]


Created libmspack tracking bugs for this issue:

Affects: epel-all [bug 1644219]
Affects: fedora-all [bug 1644218]

Comment 4 Stefan Cornelius 2018-11-09 15:14:02 UTC

Statement:

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

Comment 5 errata-xmlrpc 2019-08-06 12:07:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2049 https://access.redhat.com/errata/RHSA-2019:2049

Comment 6 Product Security DevOps Team 2019-08-06 19:19:56 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2018-18585