The Novell Netware Remote Manager may be vulnerable to buffer overflow attacks.
SecurityFocus BID 4405 states
If a HTTP Basic Authentication request is sent with extremely long values for the username or password field, a buffer overflow will occur. Depending on the length of the string submitted, either the SERVER.NLM or the HTTPSTK.NLM process will halt with an ABEND error, resulting in a denial of service condition.
It may prove possible to execute arbitrary code as the server process. This has not, however, been confirmed."
AS of 4 April 2002, there is no patch or workaround for this vulnerability. Where possible, disable the service or limit its accessibility through a firewall or router access list.