TITLE:
MySQL "mysql_real_connect" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA12305

VERIFY ADVISORY:
http://secunia.com/advisories/12305/

CRITICAL:
Less critical

IMPACT:
System access

WHERE:
>From local network

SOFTWARE:
MySQL 4.x
http://secunia.com/product/404/

DESCRIPTION:
Lukasz Wojtow has reported a vulnerability in MySQL, potentially
allowing malicious people to compromise a vulnerable system.

The problem is that the "mysql_real_connect()" function doesn't
properly verify the length of IP addresses returned by a reverse DNS
lookup of a hostname. This could potentially be exploited to cause a
buffer overflow and execute arbitrary code.

Successful exploitation requires that the attacker is able to return
a malicious DNS reply when a MySQL user connects to a server.

This has been reported in MySQL 4.0.20 and prior.

It has been reported that this can't be exploited on the Linux and
OpenBSD platforms.

SOLUTION:
This will be fixed in the upcoming 4.0.21.

MySQL servers should only be allowed to connect to trusted IP
addresses.

ORIGINAL ADVISORY:
http://bugs.mysql.com/bug.php?id=4017

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet@packetstormsecurity.org

----------------------------------------------------------------------