CVE-2011-2581

Published: Sep 14, 2011Modified: Apr 29, 2026

5.0

Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability: 10.0 / Impact: 2.9

Source: NVD

Description

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.

Affected (12)

Products: Cisco: Nx Os, Nexus 5000, Nexus 3000

3 products

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Cisco Nx Os	Version 5.0(2)
Cisco Nx Os	Version 5.0(3)n1(1)
Cisco Nx Os	Version 5.0(3)n1(1a)
Cisco Nx Os	Version 5.0(3)n1(1b)
Cisco Nx Os	Version 5.0(3)
Cisco Nx Os	Version 5.0(3)n1(1c)
Cisco Nexus 5000	All versions

Configuration B

5 vulnerable

Vulnerable Software	Affected Versions
Cisco Nx Os	Up to 5.0\(3\)u1\(2\)
Cisco Nx Os	Version 5.0(3)u1(1a)
Cisco Nx Os	Version 5.0(3)u1(1b)
Cisco Nx Os	Version 5.0(3)u1(1d)
Cisco Nexus 3000	All versions