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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS/IOS XE Autonomic Networking Validation Flaw Lets Remote Users Bypass the Certificate Revocation List
SecurityTracker Alert ID:  1038997
SecurityTracker URL:
CVE Reference:   CVE-2017-6664   (Links to External Site)
Date:  Jul 26 2017
Impact:   Host/resource access via network
Vendor Confirmed:  Yes  
Version(s): 15.5(1)S3.1, Denali-16.2.1
Description:   A vulnerability was reported in Cisco IOS and IOS XE. A remote user can bypass security controls on the target system.

The system does not transfer certificate revocation lists (CRLs) across Autonomic Control Plane (ACP) channels. A remote user can bypass the CRL checks and access resources on the target Autonomic Networking infrastructure after the certificate has been revoked.

The vendor has assigned bug ID CSCvd22328 to this vulnerability.

Omar Eissa of ERNW (at Black Hat USA 2017) reported this vulnerability.

Impact:   A remote user can bypass the certificate revocation list check to access resources on the target network.
Solution:   No solution was available at the time of this entry.

The vendor advisory is available at:

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

Message History:   None.

 Source Message Contents

Date:  Wed, 26 Jul 2017 18:00:26 +0000


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