Input validation error in PHP - CVE-2007-2727
Published: November 7, 2022 / Updated: June 8, 2025
Vulnerability identifier: #VU110399
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2007-2727
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PHP Group
Affected software:
PHP
PHP
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
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.
How to mitigate CVE-2007-2727
Install update from vendor's website.
Sources
- http://blog.php-security.org/archives/80-Watching-the-PHP-CVS.html
- http://www.fortheloot.com/public/mcrypt.patch
- http://bugs.php.net/bug.php?id=40999
- 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
- http://www.php.net/ChangeLog-5.php
- http://www.securityfocus.com/bid/23984
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:187
- http://www.novell.com/linux/security/advisories/2007_15_sr.html
- http://secunia.com/advisories/26895
- http://osvdb.org/36087