Bug 1470204 (CVE-2017-10672)

Summary:	CVE-2017-10672 perl-XML-LibXML: Use-after-free by controlling the arguments to a replaceChild call
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:	carnil, jplesnik, perl-devel, perl-maint-list, ppisar, psabata
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:	2017-07-27 08:39:21 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:	1470205
Bug Blocks:	1470206

Description Andrej Nemec 2017-07-12 14:06:55 UTC

Use-after-free in the XML-LibXML module through 2.0129 for Perl allows attackers to execute arbitrary code by controlling the arguments to a replaceChild call.

Upstream issue:

https://rt.cpan.org/Public/Bug/Display.html?id=122246

Comment 1 Andrej Nemec 2017-07-12 14:07:18 UTC

Created perl-XML-LibXML tracking bugs for this issue:

Affects: fedora-all [bug 1470205]

Comment 2 Petr Pisar 2017-07-17 11:29:14 UTC

Upstream provided a patch that simply short-circuits the case of replacing a child node with the same node to no-operation.

Comment 3 Petr Pisar 2017-07-17 11:37:41 UTC

There is an alternative fix provided by the reporter <https://github.com/shlomif/perl-XML-LibXML/pull/8>.

Comment 5 Stefan Cornelius 2017-07-27 08:39:30 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/.