The version of microcode_ctl installed on the remote host is prior to 2.1-47. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2022-1800 advisory.

    A flaw was found in hw. Processor optimization removal or modification of security-critical code for some     Intel(R) processors may potentially allow an authenticated user to enable information disclosure via local     access. (CVE-2022-21151)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXBA:2022-4034:07 advisory.

  - Sensitive information accessible by physical probing of JTAG interface for some Intel(R) Processors with     SGX may allow an unprivileged user to potentially enable information disclosure via physical access.
    (CVE-2022-0005)

  - Improper access control for some Intel(R) Xeon(R) Processors may allow an authenticated user to     potentially enable information disclosure via local access. (CVE-2022-21131)

  - Improper input validation for some Intel(R) Xeon(R) Processors may allow a privileged user to potentially     enable denial of service via local access. (CVE-2022-21136)

  - Processor optimization removal or modification of security-critical code for some Intel(R) Processors may     allow an authenticated user to potentially enable information disclosure via local access.
    (CVE-2022-21151)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5486-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2022-2022-129 advisory.

    A flaw was found in hw. The APIC can operate in xAPIC mode (also known as a legacy mode), in which APIC     configuration registers are exposed through a memory-mapped I/O (MMIO) page. This flaw allows an attacker     who can execute code on a target CPU to query the APIC configuration page. When reading the APIC     configuration page with an unaligned read from the MMIO page, the registers may return stale data from     previous requests made by the same processor core to the same configuration page, leading to unauthorized     access. (CVE-2022-21233)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-055 advisory.

    2024-06-06: CVE-2021-33117 was added to this advisory.

    Improper access control for some 3rd Generation Intel(R) Xeon(R) Scalable Processors before BIOS version     MR7, may allow a local attacker to potentially enable information disclosure via local access.
    (CVE-2021-33117)

    add (CVE-2022-0005)

    A flaw was found in hw. Improper access control for some Intel(R) Xeon(R) processors may potentially allow     an authenticated user to enable information disclosure via local access. (CVE-2022-21131)

    A flaw was found in hw. Improper input validation for some Intel(R) Xeon(R) processors may allow a     privileged user to enable a denial of service via local access. (CVE-2022-21136)

    A flaw was found in hw. Processor optimization removal or modification of security-critical code for some     Intel(R) processors may potentially allow an authenticated user to enable information disclosure via local     access. (CVE-2022-21151)

    A flaw was found in hw. The APIC can operate in xAPIC mode (also known as a legacy mode), in which APIC     configuration registers are exposed through a memory-mapped I/O (MMIO) page. This flaw allows an attacker     who can execute code on a target CPU to query the APIC configuration page. When reading the APIC     configuration page with an unaligned read from the MMIO page, the registers may return stale data from     previous requests made by the same processor core to the same configuration page, leading to unauthorized     access. (CVE-2022-21233)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Processor optimization removal or modification of security-critical code for some Intel(R) Processors may     allow an authenticated user to potentially enable information disclosure via local access.
    (CVE-2022-21151)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Published	Updated	Severity
161932	Amazon Linux 2 : microcode_ctl (ALAS-2022-1800)	Nessus	Amazon Linux Local Security Checks	6/7/2022	12/11/2024	medium
291400	MiracleLinux 9 : microcode_ctl-20220207-1.20220510.1.el9 (AXBA:2022-4034:07)	Nessus	Miracle Linux Local Security Checks	1/19/2026	1/19/2026	medium
162404	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Intel Microcode vulnerabilities (USN-5486-1)	Nessus	Ubuntu Local Security Checks	6/20/2022	8/29/2024	medium
164708	Amazon Linux 2022 : microcode_ctl (ALAS2022-2022-129)	Nessus	Amazon Linux Local Security Checks	9/6/2022	12/11/2024	medium
173107	Amazon Linux 2023 : microcode_ctl (ALAS2023-2023-055)	Nessus	Amazon Linux Local Security Checks	3/21/2023	12/11/2024	medium
229658	Linux Distros Unpatched Vulnerability : CVE-2022-21151	Nessus	Misc.	3/5/2025	12/9/2025	medium

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