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Category:   Device (Router/Bridge/Hub)  >   F5 BIG-IP Vendors:   F5 Networks
F5 BIG-IP Policy Enforcement Manager (PEM) URL Categorization Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1040332
SecurityTracker URL:
CVE Reference:   CVE-2017-6169   (Links to External Site)
Date:  Feb 7 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 11.6.0 - 11.6.2, 12.0.0 - 12.1.3, 13.0.0
Description:   A vulnerability was reported in F5 BIG-IP. A remote user can cause denial of service conditions on the target system.

A remote user can send specially crafted URLs to trigger a flaw in the Policy Enforcement Manager (PEM) URL categorization process and disrupt traffic processing or cause the target virtual system to fail.

Systems with PEM provisioned and using the URL categorization feature via an iRule, a Centralized Policy Matching (CPM) rule, or a BIG-IP PEM policy are affected.

The vendor has assigned ID 648786 to this vulnerability.

Impact:   A remote user can disrupt traffic processing or cause the target virtual system to fail.
Solution:   F5 has issued a fix (BIG-IP PEM 11.6.3,, 13.0.0 HF1, 13.1.0).

The F5 advisory is available at:

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

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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