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Category:   Device (Router/Bridge/Hub)  >   F5 BIG-IP Vendors:   F5 Networks
F5 BIG-IP TLS Handshake Processing Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1041017
SecurityTracker URL:
CVE Reference:   CVE-2018-5513   (Links to External Site)
Date:  Jun 1 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 11.x, 12.x, 13.x
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 data during a Transport Layer Security (TLS) handshake to cause the target Traffic Management Microkernel (TMM) to stop responding.

Systems with a Proxy SSL configuration enabled are affected.

The control plane is not affected.

Impact:   A remote user can cause denial of service conditions on the target data plane.
Solution:   F5 has issued a fix (11.5.6,,, 13.0.1,

The F5 advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Not specified

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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