A review of Azure Sphere vulnerabilities: Unsigned code execs, kernel bugs, escalation chains and firmware downgrades
Summary: Cisco Talos reported 31 published vulnerabilities in Microsoft's Azure Sphere IoT platform, two of which were in the Linux kernel itself, following Microsoft's May 2020 Azure Sphere Security Research Challenge. Talos chained vulnerabilities to reach arbitrary Secmon and Pluton syscalls and identified firmware downgrade issues that could let an attacker maintain persistence on a device even while bypassing remote attestation.
What you should know: Talos states that a firmware downgrade path could lead to full device compromise and persistence that bypasses remote attestation, and that it did not look for vulnerabilities in older firmware versions - a motivated attacker, it notes, certainly would.
Read the original at Cisco Talos ↗
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