Check Point Advisories

Samba LSA LsarAddPrivilegesToAccount Crafted Request Handling Heap Overflow (CVE-2007-2446)

Check Point Reference: CPAI-2007-272
Date Published: 15 Sep 2010
Severity: High
Last Updated: Sunday 14 February, 2016
Source:
Industry Reference:CVE-2007-2446
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Samba is an open-source implementation of the file, print, and other network services suite known as SMB/CIFS (Server Message Block/Common Internet File System). A heap-based buffer overflow vulnerability exists in the way Samba handles RPC messages. The vulnerability is due to a boundary error while performing "LsarAddPrivilegesToAccount" operation. Remote authenticated attackers can exploit this vulnerability by sending a specially crafted RPC request to the LSA RPC interface. Successful exploitation of this vulnerability allows attackers to execute arbitrary code on the vulnerable system in the context of the affected process. If code injection attack is successful, the behavior of the target is entirely dependent on the intended function of the injected code. The code in such a case would execute within the security of the affected process, commonly the Unix account mapped for the SMB user. In an attack case where code injection is not successful, if Samba server is running in daemon mode, the child process that handles the attacker's connection will not terminate.

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

  1. In the IPS tab, click Protections and find the Samba LSA LsarAddPrivilegesToAccount Crafted Request Handling Heap Overflow protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  MS-RPC Enforcement Violation.
Attack Information:  Samba LSA RPC LsarAddPrivilegesToAccount crafted request handling heap overflow

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