Check Point Advisories

Samba SID Parsing Stack Buffer Overflow (CVE-2010-3069)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-448
Date Published:	15 Nov 2010
Severity:	Critical
Last Updated:	Monday 15 November, 2010
Source:
Industry Reference:	CVE-2010-3069
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). Samba implements several protocols and services, including NetBIOS over TCP/IP (NBT), SMB, CIFS (an enhanced version of SMB), DCE/RPC or more specifically, MSRPC, the Network Neighbourhood suite of protocols, and more. A buffer overflow vulnerability has been reported in Samba. The vulnerability is due to a boundary error when parsing the Security ID (SID) in SMB packets. Remote attackers could exploit this vulnerability by sending a crafted SMB message to a target SMB server. Successful exploitation would allow for arbitrary code injection and execution which might allow the attacker to take complete control of a target host. Code injection that does not result in execution could crash the vulnerable service, and result 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 Samba SID Parsing Stack Buffer Overflow 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: Windows SMB Protection Violation.
Attack Information: Samba SID parsing stack buffer overflow