Long username used for Telnet authentication

telnet-auth-user-long (3948) The risk level is classified as LowLow Risk

Description:

An attempt to send a very long authentication username using a Telnet client has been detected. A long username often indicates an attempt to probe telnet daemons for possible buffer overflows, and it should be considered very suspicious.

Platforms Affected:

  • Byte Fusion Corporation, BFTelnet Server 1.1
  • Gamsoft, GAMSoft Telsrv 1.4
  • Gamsoft, GAMSoft Telsrv 1.5
  • GoodTech Systems, GoodTech Telnet Server NT 2.2.1
  • Pragma Systems, Pragma InterAccess 4.0b5 and prior
  • Shadow Op Software, Dragon Server 1.0
  • Shadow Op Software, Dragon Server 2.0

Remedy:

Examine other events that involve the target IP address. Examine the reported event for suspicious words or phrases. Audit the security of all involved systems. Time and resource permitting, view the associated session to determine if this event indicates an attack.

Consequences:

Gain Access

References:

Reported:

Jul 24, 1999

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