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.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-04-04T19:13:46

Updated: 2024-08-05T11:01:14.911Z

Reserved: 2018-10-08T00:00:00

Link: CVE-2018-18068

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2019-04-04T20:29:00.220

Modified: 2019-10-03T00:03:26.223

Link: CVE-2018-18068

cve-icon Redhat

No data.