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TITLE:
Cisco Nexus Series Switches ACL Deny Statement Security Bypass
Security Issue

SECUNIA ADVISORY ID:
SA45883

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45883/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45883

RELEASE DATE:
2011-09-09

DISCUSS ADVISORY:
http://secunia.com/advisories/45883/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

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

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45883

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A security issue has been reported in Cisco NX-OS, which can be
exploited by malicious people to bypass certain security
restrictions.

The security issue is caused due to an error when a remark is
configured before a deny statement on an ACL and can be exploited to
bypass deny statements.

The security issue is reported in the following products:
* Cisco Nexus 3000 Series Switches versions prior to 5.0(3)U1(2a) or
5.0(3)U2(1)
* Cisco Nexus 5000 Series Switches versions prior to 5.0(3)N2(1)

SOLUTION:
Apply update.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20110907-nexus.shtml

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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