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Last updated: 10/23/2014 4:46:28 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2007-2727

Original release date: 05/16/2007
Last revised: 11/05/2012
Source: US-CERT/NIST

Overview

The mcrypt_create_iv function in ext/mcrypt/mcrypt.c in PHP before 4.4.7, 5.2.1, and possibly 5.0.x and other PHP 5 versions, calls php_rand_r with an uninitialized seed variable and therefore always generates the same initialization vector (IV), which might allow context-dependent attackers to decrypt certain data more easily because of the guessable encryption keys.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 2.6 (LOW) (AV:N/AC:H/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 4.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information

Vendor Statements (disclaimer)

Official Statement from Red Hat (06/26/2008)
Not vulnerable. This issue did not affect the versions of php as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5, or Red Hat Application Stack 1, or 2, as the packages shipped are not compiled with the mcrypt extension affected by this issue.

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External Source: BID
Name: 23984
External Source: OSVDB
Name: 36087
External Source: SUSE
Name: SUSE-SR:2007:015
External Source: CONFIRM
Name: http://bugs.php.net/bug.php?id=40999
External Source: MISC
Name: http://www.fortheloot.com/public/mcrypt.patch
Type: Patch Information; Exploit
External Source: CONFIRM
Name: http://www.php.net/ChangeLog-5.php
External Source: CONFIRM
Name: http://cvs.php.net/viewvc.cgi/php-src/ext/mcrypt/mcrypt.c?r1=1.91.2.3.2.9&r2=1.91.2.3.2.10
External Source: SECUNIA
Name: 26895
External Source: MANDRIVA
Name: MDKSA-2007:187

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