Update Protection against MIT Kerberos ASN.1 asn1_decode_generaltime Uninitialized Pointer Reference Vulnerability
| Check Point Reference: | CPAI-2009-096 | |
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| Preemptive Since: | ||
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| Source: | Secunia Advisory: SA34347 | |
| Industry Reference(s): | CVE-2009-0846 | |
| Protection Provided by: |
Security Gateway
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| Who is Vulnerable? MIT Kerberos prior to krb5-1.6.4 Other products embedding the vulnerable product: Red Hat RHEL Desktop Workstation 5 client Red Hat Enterprise Linux 5 server Red Hat Enterprise Linux Desktop 5 client Sun Microsystems Solaris 10 Sun Microsystems Solaris 9 Sun Microsystems Sun Enterprise Authentication Mechanism 1.0.1 Sun Microsystems OpenSolaris | ||
| Vulnerability Description A memory corruption vulnerability has been discovered in the MIT Kerberos server. MIT Kerberos V5 is an implementation of the Kerberos protocol that allows for the negotiation of an authenticated, and optionally encrypted, communication channel between two points on a network. The MIT Kerberos V5 server utilizes the encrypted SUN-RPC protocol to communicate with its remote clients. A remote attacker may exploit this issue to execute arbitrary code on an affected system or to create a denial of service condition. |
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Update/Patch Available Apply patches: Patch1 Patch2 |
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Vulnerability Details The vulnerability is due to a memory corruption error in the MIT Kerberos server due to the release of an uninitialized pointer in the ASN.1 decoder while decoding maliciously crafted data. A remote attacker may exploit this vulnerability via a specially crafted RPC request sent to the kadmind daemon. Successful exploitation may create a denial of service condition, causing the Kerberos kadmind service to terminate abnormally, and may allow execution of arbitrary code on the target system. |
Protection Overview
This protection will detect and block malformed RPC requests sent to the vulnerable server.
In order for the protection to be activated, update your Security Gateway/VPN-1/InterSpect product to the latest IPS/SmartDefense update. For information on how to update IPS/SmartDefense, 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.
Additional Information
MIT Kerberos