Bug 1351070 – CVE-2016-5769 php: Integer Overflows in mcrypt_generic() and mdecrypt_generic() resulting in heap overflows

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Bug 1351070 - (CVE-2016-5769) CVE-2016-5769 php: Integer Overflows in mcrypt_generic() and mdecrypt_generic() resulting in heap overflows

Summary:	CVE-2016-5769 php: Integer Overflows in mcrypt_generic() and mdecrypt_generic...

Status:	CLOSED NOTABUG

Aliases:	CVE-2016-5769

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

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=moderate,public=20160623,repor...
Keywords:	Security

Depends On:	1351180
Blocks:	1351183
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Reported:	2016-06-29 03:22 EDT by Andrej Nemec
Modified:	2016-10-31 09:47 EDT (History)
CC List:	13 users (show)

See Also:
Fixed In Version:	php 5.5.37, php 5.6.23
Doc Type:	If docs needed, set a value
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Environment:
Last Closed:	2016-07-21 06:28:19 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Andrej Nemec 2016-06-29 03:22:21 EDT

The mcrypt_generic() and mdecrypt_generic() functions are prone to an integer overflow, which result in heap based overflow.

Upstream bug:

https://bugs.php.net/bug.php?id=72455

Upstream patch:

http://git.php.net/?p=php-src.git;a=commitdiff;h=6c5211a0cef0cc2854eaa387e0eb036e012904d0

CVE assignment:

http://seclists.org/oss-sec/2016/q2/589

Comment 1 Andrej Nemec 2016-06-29 08:04:57 EDT

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1351180]

Comment 2 Fedora Update System 2016-07-02 11:27:30 EDT

php-5.6.23-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-07-02 15:22:19 EDT

php-5.6.23-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-07-02 15:27:37 EDT

php-5.6.23-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Huzaifa S. Sidhpurwala 2016-07-11 06:21:52 EDT

Analysis:

This is a integer overflow, leading to a heap based buffer overflow in the mcrypt_generic and mdecrypt_generic function. A typical attack scenario is a user supplied file, which is encrypted or decrypted by a php application.

Comment 7 Huzaifa S. Sidhpurwala 2016-07-21 06:28:19 EDT

Statement:

The versions of PHP package shipped with Red Hat Enterprise Linux, do not have support for mcrypt.

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