Man-in-the-Middle (MitM) attack in BIG-IP APM and APM Clients - CVE-2020-5893
Published: April 30, 2020
Vulnerability identifier: #VU27464
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2020-5893
CWE-ID: CWE-300
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: F5 Networks
Affected software:
BIG-IP APM
APM Clients
BIG-IP APM
APM Clients
Detailed vulnerability description
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.
How to mitigate CVE-2020-5893
Install updates from vendor's website.