CVE intelligence and bounded remediation

CVE-2018-7297 — Eq-3 Homematic Central Control Unit Ccu2 Firmware security vulnerability

Critical CVSS 9.8

Remote Code Execution in the TCL script interpreter in eQ-3 AG Homematic CCU2 2.29.2 and earlier allows remote attackers to obtain read/write access and execute system commands on the device. This vulnerability can be exploited by unauthenticated attackers with access to the web interface.

Severity
Critical
CVSS
9.8 (3.0)
Published
2018-02-22
CISA KEV
Not currently listed
Ecosystem
operating-system

Affected products

  • eq-3 / homematic_central_control_unit_ccu2_firmware

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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