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Computer Associates BrightStor ARCserv and Protection Suite products RPC buffer overflow vulnerabilities

Vulnerability Note VU#860048

Original Release Date: 2006-11-02 | Last Revised: 2007-02-06


Multiple vulnerabilities exist in Computer Associates backup products. If successfully exploited, these vulnerabilities may allow an attacker to execute arbitrary code.


BrightStor ARCserve Backup is a backup and data retention tool that integrates with other BrightStor Data Availability and BrightStor Storage Management solutions. Computer Associates Protection Suites offer multiple Computer Associates security and data recovery products in a single package.

BrightStor and CA (Computer Associates) Protection Suite products contain multiple buffer overflow vulnerabilities due to incorrect handling of RPC requests. These overflows may be exploited by sending a malformed RPC request with Opnum 43 (port 6503/tcp) or Opnum 45 (port 6503/tcp) to a vulnerable system.

Note that only the Microsoft Windows versions of Computer Associates products are affected by this vulnerability.

For more information, including a list of affected products, refer to the Computer Associates Security Advisory.


A remote, unauthenticated attacker may be able to execute arbitrary code with SYSTEM privileges.


According to Computer Associates:
Customers with vulnerable versions of the BrightStor ARCserve Backup products should upgrade to the latest versions which will be available for download from on or before October 5.

Restrict Access

Restricting access to port 6503/tcp at the network perimeter may mitigate the impact of this vulnerability.

Vendor Information


Computer Associates Affected

Updated:  November 02, 2006



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.


Refer to

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This vulnerability was reported by the TippingPoint and the Zero Day Initiative. TippingPoint credits LSsecurity with reporting this vulnerability.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2006-5143
Severity Metric: 0.28
Date Public: 2006-10-05
Date First Published: 2006-11-02
Date Last Updated: 2007-02-06 20:29 UTC
Document Revision: 48

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