Bug 1340742 (CVE-2016-5095)

Summary:	CVE-2016-5095 php: Integer overflow in php_filter_full_special_chars
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abhgupta, anemec, dmcphers, fedora, hhorak, jialiu, jokerman, jorton, kseifried, lmeyer, mmccomas, rcollet, tiwillia, webstack-team
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:	2016-06-09 08:57:43 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:	1340745
Bug Blocks:	1339953

Description Adam Mariš 2016-05-30 08:41:30 UTC

An integer overflow in php_filter_full_special_chars was found, similar to CVE-2016-5094.

Reported in comment for the bug:

https://bugs.php.net/bug.php?id=72135

CVE assignment:

http://seclists.org/oss-sec/2016/q2/412

Comment 1 Adam Mariš 2016-05-30 08:47:08 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1340745]

Comment 2 Fedora Update System 2016-06-03 15:22:02 UTC

php-5.6.22-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Tomas Hoger 2016-06-09 08:57:43 UTC

While the affected code was added in PHP 5.3.3:

https://github.com/php/php-src/commit/a5b5743d71fbd5ae944469a1ca443a1cdb30663a

it wasn't actually used because of the incorrect FILTER_SANITIZE_FULL_SPECIAL_CHARS constant definition, which was only corrected in PHP 5.4.18 and 5.5.2:

https://github.com/php/php-src/commit/da3886de6dc8edab3da14331227816d6ca8e9b96

This issue is similar to CVE-2016-5094, so the impact and mitigation notes in bug 1340738 comment 3 are applicable here.  This could only affect PHP installations where no or very high memory_limit is set.  The default limit in Red Hat PHP packages in 128M, and hence the default configuration is not affected.

This issue has not been addressed upstream to date.