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Supermicro BMC Firmware Vulnerabilities Allow Firmware Tampering

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2 unique sources, 2 articles

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Two medium-severity vulnerabilities in Supermicro Baseboard Management Controller (BMC) firmware allow attackers to bypass firmware verification and update the system with malicious firmware. These vulnerabilities, CVE-2025-7937 and CVE-2025-6198, exploit flaws in the cryptographic signature verification process. The vulnerabilities affect the Root of Trust (RoT) security feature, potentially allowing attackers to gain persistent control over the BMC system and the main server OS. The issues were discovered by Binarly, a firmware security company. Supermicro has released firmware fixes for impacted models, and Binarly has released proof-of-concept exploits for both vulnerabilities. CVE-2025-7937 is a bypass for a previously disclosed vulnerability, CVE-2024-10237, which was reported by NVIDIA. CVE-2025-6198 bypasses the BMC RoT security feature, raising concerns about the reuse of cryptographic signing keys.

Timeline

  1. 24.09.2025 23:13 1 articles · 7d ago

    Supermicro releases firmware fixes for impacted models

    Supermicro has released firmware fixes for impacted models. Binarly has released proof-of-concept exploits for both vulnerabilities, highlighting the need for prompt action to protect potentially impacted systems.

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  2. 23.09.2025 21:00 2 articles · 9d ago

    Two Supermicro BMC Firmware Vulnerabilities Disclosed

    Two medium-severity vulnerabilities in Supermicro BMC firmware, CVE-2025-7937 and CVE-2025-6198, were disclosed. These vulnerabilities allow attackers to bypass the firmware verification process and update the system with malicious firmware. CVE-2025-7937 is a bypass for a previously disclosed vulnerability, CVE-2024-10237, which was reported by NVIDIA. The fix for CVE-2024-10237 was found to be insufficient, allowing attackers to inject a malicious fwmap before the vendor’s original is loaded, bypassing signature verification. CVE-2025-6198 bypasses the BMC RoT security feature, raising concerns about the reuse of cryptographic signing keys. The vulnerability arises from a flawed validation logic within the auth_bmc_sig function, allowing attackers to modify the kernel or other regions while keeping the digest valid. Supermicro has released firmware fixes for impacted models. Binarly has released proof-of-concept exploits for both vulnerabilities.

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