ZDI-07-069: CA BrightStor ARCserve Backup Message Engine Insecure Method Exposure Vulnerability Nov 26 2007 10:10PM
zdi-disclosures 3com com
ZDI-07-069: CA BrightStor ARCserve Backup Message Engine Insecure Method

Exposure Vulnerability


November 26, 2007

-- CVE ID:


-- Affected Vendor:

Computer Associates

-- Affected Products:

BrightStor ARCserve Backup r11.5

BrightStor ARCserve Backup r11.1

BrightStor ARCserve Backup r11.0

BrightStor Enterprise Backup r10.5

BrightStor ARCserve Backup v9.01

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability by Digital Vaccine protection filter ID 5144.

For further product information on the TippingPoint IPS:


-- Vulnerability Details:

This vulnerability allows attackers to arbitrarily access and modify the

file system and registry of vulnerable installations of Computer

Associates BrightStor ARCserve Backup. Authentication is not required

to exploit this vulnerability.

The specific flaws exists in the Message Engine RPC service which

listens by default on TCP port 6504 with the following UUID:


The service exposes a number of insecure method calls including: 0x17F,

0x180, 0x181, 0x182, 0x183, 0x184, 0x185, 0x186, 0x187, 0x188, 0x189,

0x18A, 0x18B, and 0x18C. Attackers can leverage these methods to

manipulate both the file system and registry which can result in a

complete system compromise.

-- Vendor Response:

Computer Associates has issued an update to correct this vulnerability.

More details can be found at:


-- Disclosure Timeline:

2007.01.12 - Vulnerability reported to vendor

2007.11.26 - Coordinated public release of advisory

-- Credit:

This vulnerability was discovered by Tenable Network Security.

-- About the Zero Day Initiative (ZDI):

Established by TippingPoint, 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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