Remotely Exploitable ‘PixieFail’ Flaws Found in Tianocore EDK II PXE Implementation

Remotely Exploitable ‘PixieFail’ Flaws Found in Tianocore EDK II PXE Implementation

January 16, 2024 at 09:12AM

Quarkslab discovered multiple critical vulnerabilities in the EDK II network stack, posing a risk of remote code execution attacks. These vulnerabilities, known as PixieFAIL, affect the PXE implementation and are utilized by various vendors, including Microsoft. Quarkslab released proof-of-concept code for the vulnerabilities and anticipates the CERT Coordination Center to provide guidance on fixes and mitigations.

From the meeting notes:

– French security research firm Quarkslab found multiple serious vulnerabilities in EDK II, the open source reference implementation of the UEFI specification.
– The vulnerabilities are present in the network stack of EDK II and can be exploited during the network boot process.
– Nine vulnerabilities were identified, collectively named PixieFAIL.
– Quarkslab confirmed vulnerable code in Microsoft’s Project Mu adaptation of Tianocore’s EDK2.
– Quarkslab released proof-of-concept code to trigger the first seven vulnerabilities.
– The CERT Coordination Center will publish a notice with a comprehensive list of affected vendors and guidance to deploy fixes and mitigations.

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