CVE-2011-2581

Cisco NX-OS < 5.0(3)N2(1) and < 5.0(3)U1(2a) - Unauthenticated ACL Bypass via Comment Handling

Title source: llm
STIX 2.1

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.

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1026019
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/45883

Scores

EPSS 0.0199
EPSS Percentile 78.6%

Details

CWE
CWE-264
Status published
Products (12)
cisco/nexus_3000
cisco/nexus_5000
cisco/nx-os 5.0\(2\)
cisco/nx-os 5.0\(3\)n1\(1\)
cisco/nx-os 5.0\(3\)n1\(1a\)
cisco/nx-os 5.0\(3\)n1\(1b\)
cisco/nx-os 5.0\(3\)
cisco/nx-os 5.0\(3\)n1\(1c\)
cisco/nx-os 5.0\(3\)u1\(1a\)
cisco/nx-os 5.0\(3\)u1\(1b\)
... and 2 more
Published Sep 14, 2011
Tracked Since Feb 18, 2026