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BootKeeper: Validating Software Integrity Properties on Boot Firmware Images

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Abstract

Boot firmware, like UEFI-compliant firmware, has been the target of numerous attacks, giving the attacker control over the entire system while being undetected. The measured boot mechanism of a computer platform ensures its integrity by using cryptographic measurements to detect such attacks. This is typically performed by relying on a Trusted Platform Module (TPM). Recent work, however, shows that vendors do not respect the specifications that have been devised to ensure the integrity of the firmware’s loading process. As a result, attackers may bypass such measurement mechanisms and successfully load a modified firmware image while remaining unnoticed. In this paper we introduce BootKeeper, a static analysis approach verifying a set of key security properties on boot firmware images before deployment, to ensure the integrity of the measured boot process. We evaluate BootKeeper against several attacks on common boot firmware implementations and demonstrate its applicability.
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Dates and versions

hal-02066420 , version 1 (27-03-2019)

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Ronny Chevalier, Stefano Cristalli, Christophe Hauser, Yan Shoshitaishvili, Ruoyu Wang, et al.. BootKeeper: Validating Software Integrity Properties on Boot Firmware Images. CODASPY 2019 - Conference on Data and Application Security and Privacy, Mar 2019, Dallas, United States. pp.1-11, ⟨10.1145/3292006.3300026⟩. ⟨hal-02066420⟩
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