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CA BrightStor ARCserve Backup Agent for MS SQL Server Buffer Overflow

08.02.05

BACKGROUND

BrightStor ARCserve Backup for Windows delivers backup and restore
protection for all Windows server systems as well as Windows, Linux,
Mac OS X and UNIX client environments.

http://www3.ca.com/Solutions/ProductFamily.asp?ID=115

DESCRIPTION

Remote exploitation of a buffer overflow in the Backup Agent for
Microsoft SQL Server within Computer Associates' BrightStor ARCserve
Backup Agent for SQL allows an attacker to execute arbitrary code with
SYSTEM privileges.

BrightStor ARCserve Backup Agent for Microsoft SQL Server is a component
of the BrightStor ARCserve Backup system for handling backups of
Microsoft SQL server data. When a string with a length over 3168 bytes,
is sent to the listening port, 6070 by default, a stack based buffer
overflow occurs.

ANALYSIS

Successful exploitation allows remote attackers to execute arbitrary
code with SYSTEM level privileges. This allows for complete system
compromise including the installation or removal of software and access
to any file on the system.

DETECTION

iDEFENSE has confirmed the existence of this vulnerability in Computer
Associates BrightStor ARCserve Backup Agent for Microsoft SQL Server
version 11.0. It is suspected that all versions are vulnerable.

WORKAROUND

Restrict remote access at the network boundary, unless remote parties
require service. Access to the affected host should be filtered at the
network boundary if global accessibility is not required. Restricting
access to only trusted hosts and networks may reduce the likelihood of
exploitation.

VENDOR RESPONSE

A vendor advisory for this vulnerability can be found at:

   http://www3.ca.com/securityadvisor/vulninfo/vuln.aspx?id=33239

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CAN-2005-1272 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
security problems.

DISCLOSURE TIMELINE

04/25/2005   Initial vendor notification
04/25/2005   Initial vendor response
08/02/2005   Coordinated public disclosure

CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

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LEGAL NOTICES

Copyright © 2005 Verisign, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDEFENSE. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
email customerservice@idefense.com for permission.

Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
this information.