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MIT Kerberos KDC LDAP Back Null Pointer Dereference Denial of Service (CVE-2011-1527)

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Check Point Reference: CPAI-2012-027
Date Published:
Severity:
Source:
Industry Reference(s): CVE-2011-1527
Protection Provided by: Security Gateway
  • R75
Who is Vulnerable?
MIT Kerberos prior to krb5-1.9.1
Vulnerability Description
A denial of service vulnerability has been reported in the MIT Kerberos KDC server.
Vulnerability Details
The vulnerability is due to a NULL pointer dereference error in a certain function while handling incoming requests. A remote attacker may exploit this vulnerability by sending a malformed request to a target server. Successful exploitation could cause the KDC server to crash, resulting in a denial of service condition.

Protection Overview
This protection will detect and block the transferring of malformed requests to the server.

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

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R75 / R71 / R70

How Can I Protect My Network?
1. In the IPS tab, click Protections and find the MIT Kerberos KDC LDAP Back Null Pointer Dereference Denial of Service protection using the Search tool and Edit the protection's settings.
2. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: Application Servers Protection Violation
Attack Information: MIT Kerberos KDC LDAP back null pointer dereference denial of service