ZDI-07-072: Novell Netmail AntiVirus Agent Multiple Overflow Vulnerabilities Dec 10 2007 10:50PM
zdi-disclosures 3com com
ZDI-07-072: Novell NetMail AntiVirus Agent Multiple Heap Overflow



December 10, 2007

-- CVE ID:


-- Affected Vendor:


-- Affected Products:

NetMail 3.5.2

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability by Digital Vaccine protection filter ID 5219, 5225.

For further product information on the TippingPoint IPS:


-- Vulnerability Details:

These vulnerabilities allow attackers to execute arbitrary code on

vulnerable installations of Novell NetMail. User interaction is not

required to exploit this vulnerability.

The specific flaws exist in the AntiVirus agent which listens on a

random high TCP port. The avirus.exe service protocol reads a

user-supplied ASCII integer value as an argument to a memory allocation

routine. The specified size is added to without any integer overflow

checks and can therefore result in an under allocation. A subsequent

memory copy operation can then corrupt the heap and eventually result

in arbitrary code execution.

-- Vendor Response:

Novell has issued an update to correct this vulnerability. More details

can be found at:


-- Disclosure Timeline:

2007.02.16 - Vulnerability reported to vendor

2007.12.10 - 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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