Pointer Authentication Flaw in QEMU ARM Implementation

CVE-2020-10702

What is CVE-2020-10702?

A significant flaw has been identified in QEMU's implementation of Pointer Authentication (PAuth) support for ARM, introduced in version 4.0 and subsequently resolved in version 5.0.0. In this case, a failure in the signature generation process leads to all PAuth-enforced pointers being signed with the same signature. This allows a local attacker to retrieve the signature of a protected pointer and exploit this vulnerability to bypass the PAuth protection mechanisms for any programs running within the QEMU environment.

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