Novell Netware XNFS caller_name xdrDecodeString Remote Code Execution Vulnerability
ZDI-12-011: January 10th, 2012CVSS Score
Affected Vendors
Affected Products
TippingPoint™ IPS Customer Protection
TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11929. For further product information on the TippingPoint IPS:Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell Netware. Authentication is not required to exploit this vulnerability.
The flaw exists within the xnfs.nlm component which is used when handling NFS RPC requests. This process listens on UDP port 32779. When decoding the xdr encoded caller_name from an NLM_TEST procedure request the process uses the user supplied length as the bounds for its copy to a stack buffer. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the system.
Vendor Response
Novell has issued an update to correct this vulnerability. More details can be found at:Disclosure Timeline
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2011-06-03 - Vulnerability reported to vendor
2012-01-10 - Coordinated public release of advisory
Credit
This vulnerability was discovered by:-
Francis Provencher for Protek Research Lab's
