Cisco CNS Network Registrar Denial of Service Vulnerability

Cisco CNS Network Registrar Domain Name Service /Dynamic Host Configuration Protocol (DNS/DHCP) server for the Windows Server platforms is vulnerable to a Denial of Service attack when a certain crafted packet sequence is directed to the server. Cisco has made free software available to address this vulnerability for all affected customers.

Vulnerable Products

Cisco CNS Network Registrar for Windows NT server and Windows 2000

Products Confirmed Not Vulnerable

The following Cisco Network Registrar products are not vulnerable to the issues
described in this advisory:

  * Cisco Network Registrar for Unix
  * Cisco Network Registrar for Linux

No other Cisco products are currently known to be affected by these

For work-around or obtaining updates information, read at

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