Date: 01 October 2009
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AUSCERT External Security Bulletin Redistribution
ZDI-09-067: Novell NetWare NFS Portmapper and RPC Module
Stack Overflow Vulnerability
1 October 2009
AusCERT Security Bulletin Summary
Product: NFS Portmapper
Publisher: Zero Day Initiative
Operating System: Netware
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
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Novell NetWare NFS Portmapper and RPC Module Stack Overflow Vulnerability
ZDI-09-067: September 30th, 2009
TippingPoint IPS Customer Protection
TippingPoint IPS customers are protected against this vulnerability by
Digital Vaccine protection filter ID 8280. For further product
information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell Netware NFS Portmapper daemon.
Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of CALLIT RPC calls. The
vulnerable daemon explicitly trusts a length field when receiving data
which is later copied into a stack buffer, potentially resulting in a stack
overflow. Successful exploitation of this vulnerability can lead to remote
code execution under the context of the daemon.
Novell has issued an update to correct this vulnerability. More details can
be found at:
2009-06-23 - Vulnerability reported to vendor
2009-09-30 - Coordinated public release of advisory
This vulnerability was discovered by:
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