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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS/IOS XE Lets Remote Users Bypass Authentication on the Target System
SecurityTracker Alert ID:  1037420
SecurityTracker URL:
CVE Reference:   CVE-2016-6474   (Links to External Site)
Date:  Dec 9 2016
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 15.5(2.25)T
Description:   A vulnerability was reported in Cisco IOS and IOS XE. A remote user can bypass authentication.

A remote user can exploit a certificate signature validation flaw in the X.509v3 SSH authentication function to bypass authentication and access the target user's account via SSH.

The vendor has assigned bug ID CSCuv89417 to this vulnerability.

Impact:   A remote user can bypass authentication to access the target user's account via SSH.
Solution:   The vendor has issued a fix.

The vendor advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Authentication error

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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