efingerd reverse-lookup buffer overflow

efingerd-reverse-lookup-bo (8380) The risk level is classified as HighHigh Risk


efingerd is vulnerable to a buffer overflow caused by improper bounds checking of the hostname by the reverse-lookup function. By connecting to efingerd with a hostname containing 100 bytes or more, a remote attacker can overflow a buffer and execute arbitrary code on the system, typically as a "nobody" user.


Gain Access


No remedy available as of September 1, 2014.


  • BugTraq Mailing List, Wed Mar 06 2002 - 03:17:31 CST: efingerd remote buffer overflow and a dangerous feature.
  • efingerd Web site: efingerd.
  • BID-4239: EFingerD Reverse Resolver Buffer Overflow Vulnerability
  • CVE-2002-0423: Buffer overflow in efingerd 1.5 and earlier, and possibly up to 1.61, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a finger request from an IP address with a long hostname that is obtained via a reverse DNS lookup.
  • OSVDB ID: 5303: efingerd Long Hostname Overflow Arbitrary Code Execution

Platforms Affected:

  • Radovan Garabik efingerd 1.3
  • Radovan Garabik efingerd 1.6.1


Mar 06, 2002

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