ZDI-10-169: Novell Netware SSHD.NLM Remote Code Execution Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-10-169 September 1, 2010 -- CVSS: 9, (AV:N/AC:L/Au:S/C:C/I:C/A:C) -- Affected Vendors: Novell -- Affected Products: Novell Netware -- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell Netware. Authentication is required to exploit this vulnerability. The flaw exists within SSHD.NLM. When the application attempts to resolve an absolute path on the server, a 512 byte destination buffer is used without bounds checking. By providing a large enough value, an attacker can cause a buffer to be overflowed. Successful exploitation results in remote code execution under the context of the server. -- Vendor Response: Novell has issued an update to correct this vulnerability. More details can be found at: http://www.novell.com/support/php/search.do?cmd=displayKC&docType=kc&externalId=7006756&sliceId=1&docTypeID=DT_TID_1_1&dialogID=164386838&stateId=0%200%20164390561 -- Disclosure Timeline: 2010-04-06 - Vulnerability reported to vendor 2010-09-01 - Coordinated public release of advisory -- Credit: This vulnerability was discovered by: * Francis Provencher -- 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: http://www.zerodayinitiative.com The ZDI is unique in how the acquired vulnerability information is used. TippingPoint does not re-sell the vulnerability details or any exploit code. Instead, upon notifying the affected product vendor, TippingPoint 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, TippingPoint provides this vulnerability information confidentially to security vendors (including competitors) who have a vulnerability protection or mitigation product. Our vulnerability disclosure policy is available online at: http://www.zerodayinitiative.com/advisories/disclosure_policy/ Follow the ZDI on Twitter: http://twitter.com/thezdi
