CVE intelligence and bounded remediation

CVE-2023-5246 — Sick Fx0-Gent00000 Firmware security vulnerability

High CVSS 8.8

Authentication Bypass by Capture-replay in SICK Flexi Soft Gateways with Partnumbers 1044073, 1127717, 1130282, 1044074, 1121597, 1099832, 1051432, 1127487, 1069070, 1112296, 1044072, 1121596, 1099830 allows an unauthenticated remote attacker to potentially impact the availability, integrity and confidentiality of the gateways via an authentication bypass by capture-replay.

Severity
High
CVSS
8.8 (3.1)
Published
2023-10-23
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-287

Affected products

  • sick / fx0-gent00000_firmware
  • sick / fx0-gent00010_firmware
  • sick / fx0-gent00030_firmware
  • sick / fx0-get00000_firmware
  • sick / fx0-get00010_firmware
  • sick / fx0-gmod00000_firmware

Showing 6 representative product identities from 13 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

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Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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