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Vulnerability Assessment & Network Security Forums |
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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> CISCO >> CSCdu81936 Vulnerability Assessment Details
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CSCdu81936 |
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Uses SNMP to determine if a flaw is present Detailed Explanation for this Vulnerability Assessment It is possible to send an Address Resolution Protocol (ARP) packet on a local broadcast interface (for example, Ethernet, cable, Token Ring, FDDI) which could cause a router or switch running specific versions of Cisco IOSŪ Software Release to stop sending and receiving ARP packets on the local router interface. This will in a short time cause the router and local hosts to be unable to send packets to each other. ARP packets received by the router for the router's own interface address but a different Media Access Control (MAC) address will overwrite the router's MAC address in the ARP table with the one from the received ARP packet. This was demonstrated to attendees of the Black Hat conference and should be considered to be public knowledge. This attack is only successful against devices on the segment local to the attacker or attacking host. This vulnerability is documented in Cisco Bug ID CSCdu81936. A local attacker may use this flaw to prevent your network from working properly. Solution : http://www.cisco.com/warp/public/707/IOS-arp-overwrite-vuln-pub.shtml Network Security Threat Level: High *** As Nessus solely relied on the banner of the remote host *** this might be a false positive Networks Security ID: 3547 Vulnerability Assessment Copyright: This script is (C) 2002 Renaud Deraison |
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