CVE intelligence and bounded remediation

CVE-2022-28373 — Verizon Lvskihp Indoorunit Firmware security vulnerability

Critical CVSS 9.8

Verizon 5G Home LVSKIHP InDoorUnit (IDU) 3.4.66.162 does not properly sanitize user-controlled parameters within the crtcreadpartition function of the crtcrpc JSON listener in /usr/lib/lua/luci/crtc.lua. A remote attacker on the local network can inject shell metacharacters to achieve remote code execution as root.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-07-14
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-78

Affected products

  • verizon / lvskihp_indoorunit_firmware / 3.4.66.162

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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