CVE intelligence and bounded remediation

CVE-2024-38433 — Nuvoton Npcm750R Firmware security vulnerability

Medium CVSS 6.7

Nuvoton - CWE-305: Authentication Bypass by Primary Weakness An attacker with write access to the SPI-Flash on an NPCM7xx BMC subsystem that uses the Nuvoton BootBlock reference code can modify the u-boot image header on flash parsed by the BootBlock which could lead to arbitrary code execution.

Severity
Medium
CVSS
6.7 (3.1)
Published
2024-07-11
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-305, CWE-287

Affected products

  • nuvoton / npcm750r_firmware
  • nuvoton / npcm710r_firmware
  • nuvoton / npcm730r_firmware
  • nuvoton / npcm705r_firmware

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

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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