ZDI-07-004: CA BrightStor ARCserve Backup Tape Engine Buffer Overflow Vulnerability Jan 11 2007 07:10PM
zdi-disclosures 3com com
ZDI-07-004: CA BrightStor ARCserve Backup Tape Engine Buffer Overflow
January 11, 2007

-- CVE ID:

-- Affected Vendor:
Computer Associates

-- Affected Products:
BrightStor ARCserve Backup r11.5
BrightStor ARCserve Backup r11.1
BrightStor ARCserve Backup r11
BrightStor Enterprise Backup r10.5
BrightStor ARCserve Backup v9.01

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since November 22, 2006 by Digital Vaccine protection
filter IDs 4868 & 4881. For further product information on the
TippingPoint IPS:


-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of Computer Associates BrightStor ARCserve
Backup. User interaction is not required to exploit this

The specific flaw exists in the Tape Engine RPC service which listens
by default on TCP port 6503 with the following UUID:


The service exposes a buffer overflow in the handler for RPC opnum 0xCF
that allows for arbitrary code execution when handling user-supplied
data from the RPC request.

-- Vendor Response:
Computer Associates has issued an update to correct this vulnerability.
More details can be found at:


-- Disclosure Timeline:
2006.11.08 - Vulnerability reported to vendor
2006.11.22 - Digital Vaccine released to TippingPoint customers
2007.01.11 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Tenable Network Security.

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, a division of 3Com, The Zero Day Initiative
(ZDI) represents a best-of-breed model for rewarding security
researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:


The ZDI is unique in how the acquired vulnerability information is used.
3Com does not re-sell the vulnerability details or any exploit code.
Instead, upon notifying the affected product vendor, 3Com provides its
customers with zero day protection through its intrusion prevention
technology. Explicit details regarding the specifics of the
vulnerability are not exposed to any parties until an official vendor
patch is publicly available. Furthermore, with the altruistic aim of
helping to secure a broader user base, 3Com provides this vulnerability
information confidentially to security vendors (including competitors)
who have a vulnerability protection or mitigation product.

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