Check Point Advisories

CA BrightStor ARCServe Backup LGServer Authentication Username Overflow (CVE-2007-5003)

Vulnerability
Protection

Check Point Reference:	CPAI-2007-325
Date Published:	10 Nov 2009
Severity:	Critical
Last Updated:	Tuesday 10 November, 2009
Source:
Industry Reference:	CVE-2007-5003
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Computer Associates BrightStor ARCserve Backup for Laptops and Desktops provides backup and data recovery for remote, mobile and desktop computers. In general, a backup system is comprised of a server and multiple clients, also known as agents. The server establishes, organizes, and controls all of the BrightStor ARCserve Backup for Laptops and Desktops client user accounts. It also processes all data received from client downloads into individual client databases and archives. The server can restore user files and generate reports detailing installed hardware, software, and data files on each client with a valid user account on the server. A stack-based buffer overflow vulnerability exists in CA BrightStor ARCServe Backup for Laptops and Desktops. The vulnerability is due to insufficient bounds checking in the LGServer process while performing authentication of users. A remote unauthenticated attacker could exploit this vulnerability by sending an overly large user name to the vulnerable service, and could inject and execute arbitrary code with System privileges. In an attack case where code injection is not successful, the affected service will terminate unexpectedly. This will create a denial of service condition of the affected service only. In a more sophisticated attack where code injection results in successful process flow diverting, the behaviour 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 context of the running process, normally System.

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 CA BrightStor ARCServe Backup LGServer Authentication Username 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: CA Products Enforcement Violation.
Attack Information: CA BrightStor ARCServe Backup LGServer authentication username overflow