F5 BIG-IP up to Traffic Management Microkernel Request data processing

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in F5 BIG-IP up to (Firewall Software). It has been rated as problematic. Affected by this issue is an unknown functionality of the component Traffic Management Microkernel. The manipulation as part of a Request leads to a data processing vulnerability. Using CWE to declare the problem leads to CWE-19. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In some circumstances, the Traffic Management Microkernel (TMM) does not properly handle certain malformed Websockets requests/responses, which allows remote attackers to cause a denial-of-service (DoS) or possible remote code execution on the F5 BIG-IP system running versions 13.0.0 - or 12.1.0 -

The bug was discovered 03/22/2018. The weakness was published 03/22/2018 (Website). The advisory is shared for download at support.f5.com. This vulnerability is handled as CVE-2018-5504 since 01/12/2018. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 118630 (F5 Networks BIG-IP : TMM WebSocket vulnerability (K11718033)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370844 (F5 BIG-IP ASM TMM WebSocket and PEM Policy Denial of Service Vulnerabilities (K11718033)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118630). Similar entry is available at VDB-114919.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
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NVD Base Score: 8.1
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Class: Data processing

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 118630
Nessus Name: F5 Networks BIG-IP : TMM WebSocket vulnerability (K11718033)
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Threat Intelligenceinfo

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Recommended: Upgrade
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0-Day Time: 🔍


01/12/2018 🔍
03/21/2018 +68 days 🔍
03/22/2018 +1 days 🔍
03/22/2018 +0 days 🔍
03/22/2018 +0 days 🔍
03/23/2018 +1 days 🔍
11/02/2018 +224 days 🔍
02/22/2023 +1573 days 🔍


Vendor: f5.com

Advisory: K11718033
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-5504 (🔍)
SecurityTracker: 1040558

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Created: 03/23/2018 09:55 AM
Updated: 02/22/2023 04:14 PM
Changes: 03/23/2018 09:55 AM (64), 01/16/2020 06:35 AM (8), 02/06/2021 06:07 AM (2), 02/22/2023 04:14 PM (3)
Complete: 🔍
Cache ID: 100:2D5:40


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