Cryptographic issues in F5 Networks products - CVE-2020-5929

Vulnerability identifier: #VU46575

CSH Severity: Medium

CVSS v4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-5929

CWE-ID: CWE-310

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to usage of insecue Anonymous Diffie-Hellman (ADH) or Ephemeral Diffie-Hellman (DHE) ciphers. A remote attacker can use multiple crafted SSL/TLS handshakes to the vulnerable BIG-IP virtual server, recover the shared secret of past sessions and perform plaintext recovery of encrypted messages.

BIG-IP DDHD
BIG-IP SSLO
BIG-IP
BIG-IP Advanced WAF
BIG-IP AAM
BIG-IP Link Controller
BIG-IP DNS
BIG-IP FPS
BIG-IP APM
BIG-IP ASM
BIG-IP PEM
BIG-IP LTM
BIG-IP Analytics
BIG-IP AFM
BIG-IP GTM

Install updates from vendor's website.

BIG-IP DDHD - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP Advanced WAF - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP AAM - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP Link Controller - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP FPS - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP APM - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP ASM - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP PEM - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP LTM - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP SSLO - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP Analytics - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP AFM - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP DNS - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP GTM - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0
BIG-IP - addressed in versions 11.6.2 HF1, 11.6.3, 12.1.2 HF2, 12.1.3, 13.0.0 HF3, 13.1.0, 14.0.0

• https://support.f5.com/csp/article/K91158923

• Cryptographic issues in F5 BIG-IP products