CVE-2011-2581

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Summary

CVECVE-2011-2581
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2011-09-14 16:05:23 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 5 from [email protected]

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

Problem Types: CWE-264 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Cisco Nexus 3000 All All All All
Hardware Cisco Nexus 5000 All All All All
Application Cisco Nx-os 5.0\(2\) All All All
Application Cisco Nx-os 5.0\(3\)n1\(1a\) All All All
Application Cisco Nx-os 5.0\(3\)n1\(1b\) All All All
Application Cisco Nx-os 5.0\(3\)n1\(1\) All All All
Operating System Cisco Nx-os 5.0\(3\) All All All
Operating System Cisco Nx-os 5.0\(3\)n1\(1c\) All All All
Operating System Cisco Nx-os 5.0\(3\)u1\(1a\) All All All
Operating System Cisco Nx-os 5.0\(3\)u1\(1b\) All All All
Operating System Cisco Nx-os 5.0\(3\)u1\(1d\) All All All
Operating System Cisco Nx-os All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Cisco Nexus Series Switches ACL Deny Statement Security Bypass Security Issue - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com
Cisco NX-OS Nexus 3000 and 5000 Switches Let Remote Users Bypass Access Control Lists - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
Cisco Security Advisory: Cisco Nexus 5000 and 3000 Series Switches Access Control List Bypass Vulnerability - Cisco Systems af854a3a-2127-422b-91ae-364da2661108 www.cisco.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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