Secunia Research: CA BrightStor ARCserve Backup RPC String Buffer Overflow

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                     Secunia Research 11/10/2007

     - CA BrightStor ARCserve Backup RPC String Buffer Overflow -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software

BrightStor ARCserve Backup 11.x (for Windows)

NOTE: Other versions are also be affected.

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2) Severity

Rating: Moderately critical
Impact: System compromise
Where:  Local network

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3) Vendor's Description of Software

"It is a reliable and comprehensive data protection solution trusted
by hundreds of thousands users. It offers market-leading features,
functionality and performance to provide data protection that
minimizes costs, streamlines administrative tasks and operations and
is part of a comprehensive integrated recovery solution."

Product Link:
http://www.ca.com/us/products/product.aspx?id=4536

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in BrightStor
ARCserve Backup, which can be exploited by malicious people to
compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the parsing of
RPC strings. This can be exploited to cause a stack-based buffer
overflow in the rwxdr.dll component of a CA RPC service such as
Mediasrv.exe.

Successful exploitation allows execution of arbitrary code.

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5) Solution

The vendor has issued updates fixing the vulnerability.

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6) Time Table

27/04/2007 - Vendor notified.
27/04/2007 - Vendor response.
11/10/2007 - Public disclosure.

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7) Credits

Discovered by Dyon Balding, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2007-5326 for the vulnerability.

CA:
http://supportconnectw.ca.com/public/storage/infodocs/basb-secnotice.asp

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
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individuals, who are interested in or concerned about IT-security.

http://secunia.com/

Secunia believes that it is important to support the community and to
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security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below
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Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/

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10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-49/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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