CVE-2023-22655

La falla del mecanismo de protección en algunos procesadores Intel(R) Xeon(R) de tercera y cuarta generación cuando se utiliza Intel(R) SGX o Intel(R) TDX puede permitir que un usuario privilegiado habilite potencialmente la escalada de privilegios a través del acceso local.

A vulnerability was found in the Intel Xeon Processor's microcode. This issue may allow a malicious actor to achieve local privilege escalation when using Intel SGX or Intel TDX features.

It was discovered that some 3rd and 4th Generation Intel® Xeon® Processors did not properly restrict access to certain hardware features when using Intel® SGX or Intel® TDX. This may allow a privileged local user to potentially further escalate their privileges on the system. This issue only affected Ubuntu 23.10, Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. It was discovered that some Intel® Atom® Processors did not properly clear register state when performing various operations. A local attacker could use this to obtain sensitive information via a transient execution attack. This issue only affected Ubuntu 23.10, Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS and Ubuntu 16.04 LTS.