CVE-2018-18068 Information

Description

The ARM-based hardware debugging feature on Raspberry Pi 3 module B+ and possibly other devices allows non-secure EL1 code to read/write any EL3 (the highest privilege level in ARMv8) memory/register via inter-processor debugging. With a debug host processor A running in non-secure EL1 and a debug target processor B running in any privilege level the debugging feature allows A to halt B and promote B to any privilege level. As a debug host A has full control of B even if B owns a higher privilege level than A. Accordingly A can read/write any EL3 memory/register via B. Also with this memory access A can execute arbitrary code in EL3.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.cs.wayne.edu/fengwei/paper/nailgun-sp19.pdf https://www.computer.org/csdl/proceedings-article/sp/2019/666000b157/17D45WHONhv

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8