National Cyber Awareness System

Vulnerability Summary for CVE-2011-2581

Overview

The ACL implementation in Cisco NX-OS 5.0(2) and 5.0(3) before 5.0(3)N2(1) on Nexus 5000 series switches, and NX-OS before 5.0(3)U1(2a) on Nexus 3000 series switches, does not properly handle comments in conjunction with deny statements, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances by sending packets, aka Bug IDs CSCto09813 and CSCtr61490.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: SECTRACK

Name: 1026019

Hyperlink:http://www.securitytracker.com/id?1026019

External Source: CISCO

Name: 20110907 Cisco Nexus 5000 and 3000 Series Switches Access Control List Bypass Vulnerability

Type: Advisory

Hyperlink:http://www.cisco.com/en/US/products/products_security_advisory09186a0080b9250c.shtml

External Source: SECUNIA

Name: 45883

Hyperlink:http://secunia.com/advisories/45883