Novell NetMail IMAP Verb Literal Heap Overflow Vulnerability

2006.12.29
Risk: High
Local: Yes
Remote: Yes
CWE: CWE-Other


CVSS Base Score: 9/10
Impact Subscore: 10/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

ZDI-06-053: Novell NetMail IMAP Verb Literal Heap Overflow Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-06-053.html December 22, 2006 -- CVE ID: CVE-2006-6424 -- 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 4543. 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 versions of Novell NetMail. Authentication is not required to exploit this vulnerability. The specific flaw exists in the NetMail IMAP service, imapd.exe. The service does not sufficiently validate user-input length values when literals are appended to IMAP verbs to specify a command continuation request. The memory allocated to store the additional data may be insufficient, leading to an exploitable heap-based buffer overflow. -- 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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