CVE intelligence and bounded remediation
CVE-2018-7296 — Eq-3 Homematic Central Control Unit Ccu2 Firmware security vulnerability
Medium
CVSS 5.3
Directory Traversal / Arbitrary File Read in User.getLanguage method in eQ-3 AG Homematic CCU2 2.29.2 and earlier allows remote attackers to read the first line of an arbitrary file on the CCU2's filesystem. This vulnerability can be exploited by unauthenticated attackers with access to the web interface.
- Severity
- Medium
- CVSS
- 5.3 (3.0)
- Published
- 2018-02-22
- CISA KEV
- Not currently listed
- Ecosystem
- operating-system
- Weaknesses
- CWE-22
Affected products
- eq-3 / homematic_central_control_unit_ccu2_firmware
Matched remediation archetype
Path traversal, unsafe upload, and file handling
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Check exposure
- Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
- Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
- Review canonicalization and containment checks across supported operating systems and storage backends.
Remediate safely
- Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
- Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
- Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.
Authoritative sources
Complete CVE record and remediation plan
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