CVE intelligence and bounded remediation

CVE-2022-46353 — Siemens 6Gk5204-0Ba00-2Mb2 Firmware security vulnerability

Critical CVSS 9.8

A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (HSR) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP/HSR) (All versions < V3.2.7). The webserver of affected devices calculates session ids and nonces in an insecure manner. This could allow an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-12-13
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-330

Affected products

  • siemens / 6gk5204-0ba00-2mb2_firmware
  • siemens / 6gk5204-0ba00-2kb2_firmware
  • siemens / 6gk5204-0bs00-2na3_firmware
  • siemens / 6gk5204-0bs00-3la3_firmware
  • siemens / 6gk5204-0bs00-3pa3_firmware

Matched remediation archetype

Cryptography, certificate, signature, and channel validation

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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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