Bug 733744 (CVE-2011-3268)

Summary:	CVE-2011-3268 PHP crash in crypt() from long salt
Product:	[Other] Security Response	Reporter:	Josh Bressers <bressers>
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:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-09-19 06:21:16 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:
Bug Blocks:	732517

Description Josh Bressers 2011-08-26 16:40:28 UTC

Buffer overflow in the crypt function in PHP before 5.3.7 allows
context-dependent attackers to have an unspecified impact via a long
salt argument, a different vulnerability than CVE-2011-2483.

Comment 1 Huzaifa S. Sidhpurwala 2011-09-19 05:56:01 UTC

Reference:
https://bugs.php.net/bug.php?id=55439

Upstream patch:
http://svn.php.net/viewvc/?view=revision&amp;revision=315338

Patch for php-5.3 and php-5.4:
http://svn.php.net/viewvc?view=revision&amp;revision=315218

Comment 2 Huzaifa S. Sidhpurwala 2011-09-19 06:20:33 UTC

This vuln. will arise only either or both of the patches below have been applied:

http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/standard/php_crypt_r.c?r1=313615&r2=314434

Here strcat is replaced by strncat

http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/standard/php_crypt_r.c?r1=314434&r2=314438

Here strncat is replaced by strlcat

And finally the patch to correct this issue reverts strlcat to strcat.

Statement:

Not vulnerable. This issue did not affect the versions of php as shipped with Red Hat Enterprise Linux 4, 5, or 6. This issue did not affect the version of php53 as shipped with Red Hat Enterprise Linux 5.

Comment 3 Huzaifa S. Sidhpurwala 2011-09-19 06:21:16 UTC

This issue has been addressed in Fedora in the following updates:

Fedora-14: http://koji.fedoraproject.org/packages/php/5.3.8/1.fc14
Fedora-15: http://koji.fedoraproject.org/packages/php/5.3.8/1.fc15
Fedora-16: http://koji.fedoraproject.org/packages/php/5.3.8/1.fc16
Fedora-16-testing: http://koji.fedoraproject.org/packages/php/5.3.8/2.fc16
Fedora-Rawhide: http://koji.fedoraproject.org/packages/php/5.3.8/2.fc17