Check Point Advisories

Microsoft LSASS Authentication Process Integer Overflow (MS09-059; CVE-2009-2524)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-216
Date Published:	13 Oct 2009
Severity:	High
Last Updated:	Thursday 12 December, 2013
Source:
Industry Reference:	CVE-2009-2524
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	LSASS provides an interface for managing local security, domain authentication, and Active Directory service processes. It handles authentication for the client and for the server. An elevation of privilege vulnerability has been discovered in the Microsoft Windows Local Security Authority Subsystem Service (LSASS). The vulnerability is due to the Windows NTLM implementation in LSASS improper handling of malformed packets during NTLM authentication. A remote attacker could create a specially crafted anonymous NTLM authentication request that would cause a crash in the server-side LSASS process and restart the computer.

Protection Overview

This protection will detect and block malformed NTLM authentication requests.

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 / R71 / R70 / R65

In the IPS tab, click Protections and find the Microsoft LSASS Authentication Process Integer Overflow (MS09-059) 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: MS-RPC over CIFS Enforcement Violation.
Attack Information: Microsoft LSASS authentication process integer overflow (MS09-059)