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Computer Associates BrightStor ARCserve Backup LGSERVER.EXE stack buffer overflow

Vulnerability Note VU#611276

Original Release Date: 2007-01-31 | Last Revised: 2007-02-02


Computer Associates BrightStor ARCserve Backup contains a stack buffer overflow, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.


Computer Associates BrightStor ARCserve Backup products come with a service called LGSERVER.EXE. This service listens on ports 2200/tcp and 1900/tcp. The LGSERVER.EXE process fails to properly validate data packets received on port 1900/tcp, which can cause a stack buffer overflow. According to Computer Associates CAID 34993, the following products are affected

BrightStor ARCserve:

      BrightStor ARCserve Backup for Laptops and Desktops r11.1 SP1
      BrightStor ARCserve Backup for Laptops and Desktops r11.1
      BrightStor ARCserve Backup for Laptops and Desktops r11.0
      BrightStor Mobile Backup r4.0
CA Protection Suites r2:
      CA Desktop Protection Suite r2
      CA Business Protection Suite r2
      CA Business Protection Suite for Microsoft Small Business Server Standard Edition r2
      CA Business Protection Suite for Microsoft Small Business Server Premium Edition r2
CA Desktop Management Suite:
      DMS r11.0
      DMS r11.1
Note that exploit code for this vulnerability is publicly available.


A remote, unauthenticated attacker may be able to execute arbitrary code with local SYSTEM privileges or cause a denial-of-service condition on a vulnerable system.


Apply an update
Apply an update, as specified in Computer Associates Security Notice. The following fixes are provided

BABLD r11.1 SP2 – SP2 does not contain the vulnerability, there is no fix to apply
BABLD r11.1 SP1 - QO83833
BABLD r11.0 - QI85497
DMS r11.1 - QO85401
DMS r11.0 - QI85423
BMB r4.0 - QO85402

Restrict access

You may wish to block access to the vulnerable software from outside your network perimeter, specifically by blocking access to the ports used by the Discovery Service (typically 2200/tcp and 1900/tcp). This will limit your exposure to attacks. However, blocking at the network perimeter would still allow attackers within the perimeter of your network to exploit the vulnerability. The use of host-based firewalls in addition to network-based firewalls can help restrict access to specific hosts within the network. It is important to understand your network's configuration and service requirements before deciding what changes are appropriate.

Vendor Information


Computer Associates Affected

Updated:  January 31, 2007



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Please see the BrightStor Security Notice.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector



This vulnerability was disclosed by Computer Associates, who in turn credit NGSS.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2007-0449
Severity Metric: 25.74
Date Public: 2007-01-23
Date First Published: 2007-01-31
Date Last Updated: 2007-02-02 20:18 UTC
Document Revision: 15

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