Linksys EtherFast routers default SNMP community string information leak

linksys-etherfast-default-snmp (7827) The risk level is classified as MediumMedium Risk


Linksys EtherFast could allow a remote attacker to gain sensitive information about network traffic that is being handled by the router. A remote attacker can query an affected router with the default community of (public) to cause the router to make the querying system the SNMP trap host, which would cause certain information about network traffic to be dumped to the host. An attacker could use this to launch a distributed denial of service attack (DDoS) against a targeted host by exploiting this vulnerability on a number of affected routers.


Obtain Information


No remedy available as of September 1, 2014.


  • BugTraq Mailing List, Sun Jan 06 2002 - 06:55:17 CST: Linksys 'routers', SNMP issues.
  • BID-3795: Linksys DSL Router SNMP Trap System Arbitrary Sending Vulnerability
  • BID-3797: Linksys DSL Router Default SNMP Community String Vulnerability
  • CVE-2002-0109: Linksys EtherFast BEFN2PS4, BEFSR41, and BEFSR81 Routers, and possibly other products, allow remote attackers to gain sensitive information and cause a denial of service via an SNMP query for the default community string public

Platforms Affected:

  • Linksys BEFN2PS4
  • Linksys BEFSR81


Jan 06, 2002

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