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ZDI-06-054: Novell NetMail IMAP APPEND Buffer Overflow Vulnerability
From: zdi-disclosures () 3com com
Date: Fri, 22 Dec 2006 16:11:44 -0800

ZDI-06-054: Novell NetMail IMAP APPEND Buffer Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-06-054.html
December 22, 2006

-- CVE ID:
CVE-2006-6425

-- Affected Vendor:
Novell

-- Affected Products:
Novell NetMail 3.5.2

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since December 21, 2006 by Digital Vaccine protection
filter ID 3868. For further product information on the TippingPoint IPS:

    http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
affected installations of Novell NetMail. Successful exploitation
requires the attacker to successfully authenticate to the affected
service.

The specific flaw exists in the NetMail IMAP server's handling of the
APPEND command. A lack of bounds checking on a specific parameter to
this command can lead to a stack-based buffer overflow. This
vulnerability can be exploited to execute arbitrary code.

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

 
http://www.novell.com/support/search.do?cmd=displayKC&externalId=3096026&sliceId=SAL_Public

-- Disclosure Timeline:
2006.08.14 - Vulnerability reported to vendor
2006.12.21 - Digital Vaccine released to TippingPoint customers
2006.12.22 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by an anonymous researcher.

-- 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:

    http://www.zerodayinitiative.com

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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