USN-5486-1

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USN-5486-1

Summary: intel-microcode vulnerabilities

Details: It was discovered that some Intel processors did not implement sufficient control flow management. A local attacker could use this to cause a denial of service. (CVE-2021-0127) Joseph Nuzman discovered that some Intel processors did not properly initialise shared resources. A local attacker could use this to obtain sensitive information. (CVE-2021-0145) Mark Ermolov, Dmitry Sklyarov and Maxim Goryachy discovered that some Intel processors did not prevent test and debug logic from being activated at runtime. A local attacker could use this to escalate privileges. (CVE-2021-0146) It was discovered that some Intel processors did not properly restrict access in some situations. A local attacker could use this to obtain sensitive information. (CVE-2021-33117) Brandon Miller discovered that some Intel processors did not properly restrict access in some situations. A local attacker could use this to obtain sensitive information or a remote attacker could use this to cause a denial of service. (CVE-2021-33120) It was discovered that some Intel processors did not completely perform cleanup actions on multi-core shared buffers. A local attacker could possibly use this to expose sensitive information. (CVE-2022-21123, CVE-2022-21127) Alysa Milburn, Jason Brandt, Avishai Redelman and Nir Lavi discovered that some Intel processors improperly optimised security-critical code. A local attacker could possibly use this to expose sensitive information. (CVE-2022-21151) It was discovered that some Intel processors did not properly perform cleanup during specific special register write operations. A local attacker could possibly use this to expose sensitive information. (CVE-2022-21166)

References: https://ubuntu.com/security/notices/USN-5486-1, https://ubuntu.com/security/CVE-2021-0127, https://ubuntu.com/security/CVE-2021-0145, https://ubuntu.com/security/CVE-2021-0146, https://ubuntu.com/security/CVE-2021-33117, https://ubuntu.com/security/CVE-2021-33120, https://ubuntu.com/security/CVE-2022-21123, https://ubuntu.com/security/CVE-2022-21127, https://ubuntu.com/security/CVE-2022-21151, https://ubuntu.com/security/CVE-2022-21166