Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM Boot Error Record Table driver that could result in (1) an out-of…

Overview

Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM Boot Error Record Table driver that could result in (1) an out-of-bounds read which leaks Secure-EL0 information to a process running in Non-Secure state or (2) an out-of-bounds write which corrupts Secure or Non-Secure memory, limited to memory mapped to UEFI-MM Secure Partition by the Secure Partition Manager.

Affected

• ampereone_a192-32m_firmware < 5.4.5.1
• ampereone_a192-26m_firmware < 5.4.5.1
• ampereone_a160-28m_firmware < 5.4.5.1
• ampereone_a144-33m_firmware < 5.4.5.1
• ampereone_a144-26m_firmware < 5.4.5.1
• ampereone_a96-36m_firmware < 5.4.5.1
• ampereone_a96-36x_firmware < 4.4.5.2
• ampereone_a128-34x_firmware < 4.4.5.2
• ampereone_a144-24x_firmware < 4.4.5.2
• ampereone_a144-27x_firmware < 4.4.5.2
• ampereone_a160-28x_firmware < 4.4.5.2
• ampereone_a192-26x_firmware < 4.4.5.2
• ampereone_a192-26x_firmware < 3.5.9.3
• ampereone_a192-32x_firmware < 3.5.9.3

Remediation

Upgrade past the affected range:

• ampereone_a192-32m_firmware 5.4.5.1
• ampereone_a192-26m_firmware 5.4.5.1
• ampereone_a160-28m_firmware 5.4.5.1
• ampereone_a144-33m_firmware 5.4.5.1
• ampereone_a144-26m_firmware 5.4.5.1
• ampereone_a96-36m_firmware 5.4.5.1
• ampereone_a96-36x_firmware 4.4.5.2
• ampereone_a128-34x_firmware 4.4.5.2
• ampereone_a144-24x_firmware 4.4.5.2
• ampereone_a144-27x_firmware 4.4.5.2
• ampereone_a160-28x_firmware 4.4.5.2
• ampereone_a192-26x_firmware 3.5.9.3
• ampereone_a192-32x_firmware 3.5.9.3