CVE intelligence and bounded remediation

CVE-2020-5879 — F5 Big-Ip Application Security Manager security vulnerability

High CVSS 7.5

On BIG-IP ASM 11.6.1-11.6.5.1, under certain configurations, the BIG-IP system sends data plane traffic to back-end servers unencrypted, even when a Server SSL profile is applied.

Severity
High
CVSS
7.5 (3.1)
Published
2020-04-30
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-319

Affected products

  • f5 / big-ip_application_security_manager

Matched remediation archetype

Cryptography, certificate, signature, and channel validation

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Inventory affected algorithms, key uses, trust stores, certificate validation settings, random sources, and plaintext channels across clients and services.
  • Determine which secrets, identities, signatures, or data protections depend on the affected primitive or validation path.
  • Check debug, compatibility, fallback, and hostname or audience override settings in build and runtime configuration.

Remediate safely

  • Use a maintained platform cryptographic API with approved algorithms, modes, parameters, randomness, and full peer identity validation.
  • Remove insecure fallback and validation bypasses; separate keys by purpose and load them from managed secret storage.
  • Plan rotation or reissuance for affected keys, certificates, tokens, hashes, or ciphertext and document compatibility sequencing.

Authoritative sources

Complete CVE record and remediation plan

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