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
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-5095
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1340745
Blocks: 1339953
TreeView+ depends on / blocked
 
Reported: 2016-05-30 08:41 UTC by Adam Mariš
Modified: 2019-09-29 13:50 UTC (History)
14 users (show)

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2016-06-09 08:57:43 UTC

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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.
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