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Red Hat Directory Server / Certificate Server Buffer Overflow
Secunia Advisory: SA18590
Release Date: 2006-01-26
Last Update: 2006-05-04
Popularity: 5,988 views

Critical:
Moderately critical
Impact: Privilege escalation
System access
Where: From local network
Solution Status: Vendor Patch

Software:Netscape Certificate Management System 4.x
Netscape Directory Server 4.x
Netscape Directory Server 6.x
Red Hat Certificate System 7.x
Red Hat Directory Server 7.x

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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

Changelog:
2006-05-04: Added link to NGSSoftware advisory.

Original Advisory:
NGSSoftware:
http://www.ngssoftware.com/advisories/ntscpdsvr.txt


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