Researchers at NCC Group have identified several critical vulnerabilities in the widely-used U-Boot bootloader, a standard component for many embedded systems and IoT devices. These flaws, primarily involving heap buffer overflows in the implementation of the IP stack and SquashFS filesystem (notably CVE-2022-30790 and CVE-2022-30552), could allow an attacker to bypass security measures such as Verified Boot.
Exploitation typically requires physical access or existing root-level privileges on the target system. Successful exploitation allows for the execution of arbitrary code during the pre-boot stage, enabling the installation of persistent firmware-level malware or rootkits that remain undetected by higher-level operating system security controls.
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