ZDI-06-008: Novell GroupWise Messenger Accept-Language Buffer Overflow http://www.zerodayinitiative.com/advisories/ZDI-06-008.html April 13, 2006 -- CVE ID: CVE-2006-0092 -- Affected Vendor: Novell -- Affected Products: Novell GroupWise Messenger 2 -- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability since March 14, 2006 by Digital Vaccine protection filter ID 3994. For further product information on the TippingPoint IPS: http://www.tippingpoint.com -- Vulnerability Details: This vulnerability allows attackers to execute arbitrary code on vulnerable installations of the Novell GroupWise Messenger. Authentication is not required to exploit this vulnerability. The specific flaw exists within the Novell Messaging Agent, a web server that listens by default on TCP port 8300. Insufficient length checks during the parsing of long parameters within the Accept-Language header results in an exploitable stack overflow under the context of the SYSTEM user. -- Vendor Response: A fix for the described issue is available in GroupWise Messenger 2.0 Public Beta 2. The fix will also be included in the shipping release of Messenger 2.0 SP1. TID #NOVL105592 further details the specifics of the patch: http://support.novell.com/cgi-bin/search/searchtid.cgi?10100861.htm -- Disclosure Timeline: 2006.03.16 - Vulnerability reported to vendor 2006.03.14 - Digital Vaccine released to TippingPoint customers 2006.04.13 - Coordinated public release of advisory -- Credit: This vulnerability was discovered by CIRT.DK. -- 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.