Bug 782951 (CVE-2012-0781)

Summary:	CVE-2012-0781 php: tidy_diagnose() NULL pointer dereference may cause DoS
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	fedora, jorton, rpm
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 5.3.9	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-27 17:15:50 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:	830729, 830730
Bug Blocks:	782956, 835959

Description Vincent Danen 2012-01-18 22:34:43 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2012-0781 to
the following vulnerability:

Name: CVE-2012-0781
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0781
Assigned: 20120118
Reference: http://archives.neohapsis.com/archives/bugtraq/2012-01/0092.html
Reference: http://www.exploit-db.com/exploits/18370/
Reference: http://cxsecurity.com/research/103

The tidy_diagnose function in PHP 5.3.8 might allow remote attackers
to cause a denial of service (NULL pointer dereference and application
crash) via crafted input to an application that attempts to perform
Tidy::diagnose operations on invalid objects, a different
vulnerability than CVE-2011-4153.

Comment 1 Vincent Danen 2012-01-18 22:40:33 UTC

This should be corrected in 5.3.9, as per this note in the PHP 5.3.9 changelog:

Fixed bug #54682 (Tidy::diagnose() NULL pointer dereference). (Maksymilian Arciemowicz, Felipe)

The upstream commit to fix is here:

http://svn.php.net/viewvc?view=revision&revision=319254

Comment 2 Huzaifa S. Sidhpurwala 2012-02-06 06:44:38 UTC

This issue affects the version of php as shipped with Red Hat Enterprise Linux 6.

This issue did not affect the version of php as shipped with Red Hat Enterprise Linux 4 and 5. This issue did not affect the version of php53 as shipped with Red Hat Enterprise Linux 5. Since neither of these packages ship the standard PHP module providing tidy library support.

This issue did not affect the version of php as shipped with Fedora 15 and Fedora 16.

Comment 5 errata-xmlrpc 2012-06-27 15:52:51 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:1046 https://rhn.redhat.com/errata/RHSA-2012-1046.html