Integer Overflow in bl2 Could Bypass Secure Boot

CVE-2024-1633

What is CVE-2024-1633?

A vulnerability within the bootloader's secure boot process allows for an integer overflow due to the mishandling of image lengths and destinations defined in the bl2_mem_params_descs table. The second stage of the bootloader, bl2, iterates through images, reading critical data from their certificates. The reliance on a 32-bit unsigned integer for these operations creates a scenario where attackers can potentially exploit memory range restrictions, leading to unauthorized data write operations beyond buffer limits. This could facilitate a bypass of secure boot mechanisms, undermining the integrity of the device.

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