Check Point Advisories

CA BrightStor ARCServe Backup LGServer Arbitrary File Upload (CVE-2007-5005; CVE-2008-1329)

Vulnerability
Protection

Check Point Reference:	CPAI-2007-326
Date Published:	22 Oct 2009
Severity:	Critical
Last Updated:	Thursday 22 October, 2009
Source:
Industry Reference:	CVE-2007-5005 CVE-2008-1329
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. An arbitrary file upload vulnerability exists in CA BrightStor ARCServe Backup for Laptops and Desktops. The vulnerability is due to insufficient access control in the LGServer process while handling file uploads from remote users. A remote unauthenticated attacker could exploit this vulnerability to upload file to specified location on the target file system. Moreover, the attacker can facilitate other functionality of the affected server to load and execute the uploaded file with System privileges. In a successful attack case, the attacker could write arbitrary file to an arbitrary directory using SYSTEM-level privileges. This vulnerability can be used to overwrite critical files, such as ARCserve LGServer's "security.dll" with malicious content. Overwritten DLL can then be immediately loaded into memory by calling another rxrLogin request, which would now inject the potentially-malicious "security.dll" into the ARCserve LGServer process.

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 Arbitrary File Upload 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 arbitrary file upload