SB2020043023 - Man-in-the-Middle (MitM) attack in F5 BIG-IP APM and APM Clients

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Main Vulnerability Database SB2020043023

SB2020043023 - Man-in-the-Middle (MitM) attack in F5 BIG-IP APM and APM Clients

Published: April 30, 2020 Updated: April 30, 2020

Security Bulletin ID SB2020043023
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2020-5893)

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists when a user connects to a VPN using BIG-IP Edge Client over an unsecure network, BIG-IP Edge Client responds to authentication requests over HTTP while sending probes for captive portal detection. A remote attacker can perform a man-in-the-middle attack by deploying a malicious captive portal to obtain the encrypted NT Lan Manager (NTLM) challenge response.


Remediation

Install update from vendor's website.

References