CVE intelligence and bounded remediation

CVE-2023-23774 — Motorola EBTS/MBTS Site Controller drops to debug prompt on unhandled exception

High CVSS 8.4

Motorola EBTS/MBTS Site Controller drops to debug prompt on unhandled exception. The Motorola MBTS Site Controller exposes a debug prompt on the device's serial port in case of an unhandled exception. This allows an attacker with physical access that is able to trigger such an exception to extract secret key material and/or gain arbitrary code execution on the device.

Severity
High
CVSS
8.4 (3.1)
Published
2023-08-29
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-248, CWE-755

Affected products

  • motorola / ebts_site_controller_firmware
  • motorola / mbts_site_controller_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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