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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS Lets Remote Users Bypass Port Access Controls on the Target System
SecurityTracker Alert ID:  1036954
SecurityTracker URL:
CVE Reference:   CVE-2016-6422   (Links to External Site)
Date:  Oct 6 2016
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7600 Series Routers; Catalyst 6500 Series Switches
Description:   A vulnerability was reported in Cisco IOS on 7600 series routers and Catalyst 6500 series switches. A remote user can bypass access controls on the target system.

The ternary content addressable memory (TCAM) share access control list does not properly process certain access control entries (ACEs) in the port access control list. A remote user can bypass ACEs

Supervisor Engine 720 and Supervisor Engine 32 Modules for Cisco Catalyst 6500 series switches and Cisco 7600 series routers are affected.

ACEs that include a greater than operator, a less than operator, a tcp flag, the established keyword, or the range keyword may be affected.

The vendor has assigned bug ID CSCuy64806 to this vulnerability.

Impact:   A remote user can bypass certain access controls on the target system.
Solution:   The vendor has issued a fix.

The vendor advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error

Message History:   None.

 Source Message Contents

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