Bug 1340742 – CVE-2016-5095 php: Integer overflow in php_filter_full_special_chars

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Bug 1340742 - (CVE-2016-5095) CVE-2016-5095 php: Integer overflow in php_filter_full_special_chars

Summary:	CVE-2016-5095 php: Integer overflow in php_filter_full_special_chars

Status:	CLOSED WONTFIX

Aliases:	CVE-2016-5095

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
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URL:
Whiteboard:	impact=low,public=20160517,reported=2...
Keywords:	Security

Depends On:	1340745
Blocks:	1339953
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Reported:	2016-05-30 04:41 EDT by Adam Mariš
Modified:	2016-07-11 09:16 EDT (History)
CC List:	14 users (show)

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Last Closed:	2016-06-09 04:57:43 EDT
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Description Adam Mariš 2016-05-30 04:41:30 EDT

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 04:47:08 EDT

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1340745]

Comment 2 Fedora Update System 2016-06-03 11:22:02 EDT

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 04:57:43 EDT

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.

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