Debug Functions Unlockable Without Triggering Measured Boot

CVE-2023-43633

What is CVE-2023-43633?

An identified security configuration vulnerability in EVE OS allows unauthorized modification of the system's configuration during boot. This flaw occurs when the Pillar eve container checks for the presence of '/config/GlobalConfig/global.json'. If this file exists, it can overwrite critical configuration settings, enabling potential unauthorized access to the device. Attackers can exploit this to enable SSH access with custom 'authorized_keys', unlock USB ports to allow keyboard input, and permit VNC access—all without triggering the 'measured boot' mechanism. Notably, since the '/config' partition is mutable and not encrypted, attackers can gain full control over the device without changing the Platform Configuration Register (PCR) values.

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References