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CVE-2024-38433: Nuvoton - CWE-305: Authentication Bypass by Primary Weakness

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-11 · updated 2026-06-17
• Weakness: CWE-305

Description

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.

Affected products

• Nuvoton Npcm705R Firmware: before 10.10.19 — fixed in 10.10.19
• Nuvoton Npcm710R Firmware: before 10.10.19 — fixed in 10.10.19
• Nuvoton Npcm730R Firmware: before 10.10.19 — fixed in 10.10.19
• Nuvoton Npcm750R Firmware: before 10.10.19 — fixed in 10.10.19

How to fix

Upgrade to a fixed version: Nuvoton Npcm705R Firmware 10.10.19; Nuvoton Npcm710R Firmware 10.10.19; Nuvoton Npcm730R Firmware 10.10.19; Nuvoton Npcm750R Firmware 10.10.19. Check the vendor advisory for mitigations.

References

• https://www.gov.il/en/Departments/faq/cve_advisories
• https://www.gov.il/en/Departments/faq/cve_advisories

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