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AUSCERT External Security Bulletin Redistribution
ESB-2008.0448 -- [Win]
Unauthenticated Stack Overflow in SNMPc
1 May 2008
AusCERT Security Bulletin Summary
Product: Castle Rock Computing SNMPc Network Manager
Operating System: Windows
Impact: Execute Arbitrary Code/Commands
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Name: Unauthenticated Stack Overflow in SNMPc
Release Date: 30 April 2008
Discover: Wade Alcorn <firstname.lastname@example.org> and John Heasman
Vendor: Castle Rock Computing
Systems Affected: SNMPc versions 7.1 and earlier
Wade Alcorn and John Heasman of NGSSoftware have discovered a stack
overflow vulnerability in Castle Rock Computing SNMPc Network Manager.
SNMPc Network Manger is a distributed network management system that
allows monitoring of the network infrastructure. It employs a
distributed polling agent architecture which uses SNMP TRAPs to provide
a solution capable of monitoring networks with up to ten thousand
devices. An SNMP TRAP initiated by a network element is sent to the
SNMPc Network Manager to allow monitoring of the infrastructure.
The vulnerability can be exploited when an overly long community string
is sent in the SNMP TRAP packet. The packets format will be valid ASN.1,
including the length of the community string. An attacker can craft a
single UDP packet that can lead to the execution of arbitrary code in
the context of LocalSystem.
NGSSoftware wish to note that Castle Rock Computing were extremely
pro-active in addressing this issue.
The latest version (SNMPc 7.1.1) can be downloaded from the Castle Rock
Computing website: http://www.castlerock.com/.
NGSSoftware Insight Security Research
+44(0)208 401 0070
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