Rule: alert ip any any -> any any (msg:"EXPLOIT EIGRP prefix length overflow attempt"; ip_proto:88; byte_test:1,>,32,44; reference:cve,CAN-2004-0176; reference:bugtraq,9952; classtype:attempted-admin; sid:2464; rev:1;) -- Sid: 2464 -- Summary: This event is generated when an attempt is made to exploit a buffer overflow associated with the Ethereal decode of the Enhanced Interior Gateway Routing Protocol (EIGRP). -- Impact: A successful attack may allow the execution of arbitrary code as root or LOCAL_SYSTEM privilege on a vulnerable host. -- Detailed Information: There is a vulnerability associated with particular versions of Ethereal that may cause a buffer overflow when a malformed EIGRP packet is decoded. This may permit the execution of arbitrary code with root or LOCAL_SYSTEM privilege. The buffer overflow occurs when a larger than expected packet length value is discovered in the EIGRP payload. -- Affected Systems: Any host running Ethereal versions 0.8.14 through 0.10.2. -- Attack Scenarios: An attacker can create and send a malformed EIGRP packet, and if decoded by a vulnerable version of Ethereal, can cause a buffer overflow and the subsequent execution of arbitrary code. -- Ease of Attack: Simple. Exploit code is available. -- False Positives: None known. -- False Negatives: None known. -- Corrective Action: Update to version 0.10.3 of Ethereal. -- Contributors: Sourcefire Research Team Brian Caswell <bmc@sourcefire.com> Judy Novak <judy.novak@sourcefire.com> -- Additional References CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0176 Bugtraq: http://www.securityfocus.com/bid/9952 --
