TITLE:
PHP "mysql_connect" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA18275

VERIFY ADVISORY:
http://secunia.com/advisories/18275/

CRITICAL:
Less critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
PHP 4.4.x
http://secunia.com/product/5768/
PHP 4.3.x
http://secunia.com/product/922/

DESCRIPTION:
mercenary has discovered a vulnerability in PHP, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the handling
of the named pipe part of the "server" parameter passed to the
"mysql_connect()" PHP function in the "HANDLE create_named_pipe()"
function in "libmysql.c". This can be exploited to cause a
stack-based buffer overflow via a PHP script calling
"mysql_connect()" where the "server" parameter can be controlled by
the attacker.

NOTE: Exploit code is publicly available.

The vulnerability has been confirmed in version 4.4.1 for Windows.
Versions  4.3.10 and 4.4.0 for Windows are reportedly also affected.
Other versions may also be affected.

SOLUTION:
Ensure that PHP scripts do not call the "mysql_connect()" PHP
function with input originating from untrusted sources.

PROVIDED AND/OR DISCOVERED BY:
mercenary

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-January/041013.html

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About:
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