TITLE:
Red Hat Directory Server / Certificate Server Buffer Overflow

SECUNIA ADVISORY ID:
SA18590

VERIFY ADVISORY:
http://secunia.com/advisories/18590/

CRITICAL:
Moderately critical

IMPACT:
Privilege escalation, System access

WHERE:
>From local network

SOFTWARE:
Netscape Directory Server 4.x
http://secunia.com/product/3318/
Netscape Certificate Management System 4.x
http://secunia.com/product/3832/
Netscape Directory Server 6.x
http://secunia.com/product/3841/
Red Hat Certificate System 7.x
http://secunia.com/product/7017/
Red Hat Directory Server 7.x
http://secunia.com/product/7016/

DESCRIPTION:
Peter Winter-Smith of NGSSoftware has reported a vulnerability in Red
Hat Directory Server and Red Hat Certificate System, which can be
exploited by malicious, local users to gain escalated privileges and
potentially by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error related to the
Help buttons available in the Admin pages of the Management Console.
This can be exploited to cause a stack-based buffer overflow by
connecting to the Management Console and sending a specially crafted
request.

According to the vendor, it is not possible to exploit the
vulnerability remotely on Unix systems. However, it is exploitable by
local users to gain root privileges.

The vulnerability has been reported in Red Hat Directory Server 7.1,
Red Hat Certificate
System 7.1, and prior Netscape releases of these products.

SOLUTION:
The vendor has fixed the vulnerability in Red Hat Directory Server
7.1 SP1, which is available via Red Hat Network.

The vulnerability is also addressed in Red Hat Certificate System 7.1
SP1, which will be available in early 2006. The vendor recommends
removing the "help.cgi" file in the meantime.

PROVIDED AND/OR DISCOVERED BY:
Peter Winter-Smith of NGSSoftware

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