Bug 1461762 (CVE-2017-9433)

Summary:	CVE-2017-9433 libmwaw: Out-of-bounds write in the MsWrd1Parser::readFootnoteCorrespondence function
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	caolanm, dtardon
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-06-29 13:48:12 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:	1461763
Bug Blocks:	1461764

Description Andrej Nemec 2017-06-15 09:34:01 UTC

Document Liberation Project libmwaw has an out-of-bounds write caused by a heap-based buffer overflow related to the MsWrd1Parser::readFootnoteCorrespondance function in lib/MsWrd1Parser.cxx.

References:

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1037

Upstream patch:

https://sourceforge.net/p/libmwaw/libmwaw/ci/68b3b74569881248bfb6cbb4266177cc253b292f/

Comment 1 Andrej Nemec 2017-06-15 09:34:45 UTC

Created libmwaw tracking bugs for this issue:

Affects: fedora-all [bug 1461763]

Comment 3 Stefan Cornelius 2017-06-29 13:48:12 UTC

This can result in a heap-based memory corruption. By tricking a user into opening a specially crafted Microsoft Word document in an application using libmwaw, an attacker could possibly use this flaw to execute arbitrary code with the privileges of the user opening the file.

Comment 4 Stefan Cornelius 2017-06-29 13:48:21 UTC

Statement:

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.