Check Point Advisories

MIT Kerberos KDC Ticket Validation Double Free Memory Corruption (CVE-2010-1320)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-428
Date Published:	8 Aug 2010
Severity:	Critical
Last Updated:	Monday 16 December, 2013
Source:
Industry Reference:	CVE-2010-1320
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Kerberos is a protocol that allows for the negotiation of an authenticated, and optionally encrypted, communication channel between two points on a network. MIT Kerberos V5 is an implementation of this protocol. A memory corruption vulnerability exists in the MIT Kerberos KDC server. The vulnerability is due to a double-free in the ticket validation mechanism (do_tgs_req.c). A remote attacker can exploit this issue by sending a specially crafted packet to the target server. Successful exploitation of this vulnerability would allow code injection and execution in the context of root account and might cause the vulnerable server to terminate abnormally, resulting in a denial of service condition.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the MIT Kerberos KDC Ticket Validation Double Free Memory Corruption protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Application Servers Protection Violation.
Attack Information: MIT Kerberos KDC ticket validation double free memory corruption