Vulnerability Note VU#4923

Windows NT SNMP agent leaks memory

Original Release date: 15 Nov 2001 | Last revised: 15 Nov 2001


The Microsoft SNMP agent, prior to Windows NT 4.0 Service Pack 4.0, will leak memory.


Microsoft's SNMP agent, snmp.exe, priot to Windows NT 4.0 Service Pack 4.0, will leak memory if the OID cannot be decoded. Quoting from Microsoft KB article Q178381,

If SNMP cannot decode an OID from a network packet, SNMP does not free up the memory, resulting in a memory leak in the Snmp.exe processes. The impact of this leak will be more evident on a system running on a network segment that receive lots of SNMP broadcast traffic.

An intruder can craft a malicious SNMP packet and consume memory on a victim host.

This problem was addressed by Microsoft in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.


Intruders can consume memory on vulnerable machines, causing denial or degredation of service.


Upgrade to Windows NT service pack 4 or later, as described in

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
MicrosoftAffected16 Apr 199815 Nov 2001
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



Our thanks to Microsoft for the information in their Knowledgebase.

This document was written by Shawn V Hernan.

Other Information

  • CVE IDs: Unknown
  • Date Public: 24 Mar 98
  • Date First Published: 15 Nov 2001
  • Date Last Updated: 15 Nov 2001
  • Severity Metric: 1.90
  • Document Revision: 5


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