var-202202-0082
Vulnerability from variot
Improper initialization of shared resources in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. plural Intel(R) Processor Has an initialization vulnerability.Information may be obtained. ========================================================================== Ubuntu Security Notice USN-5535-1 July 28, 2022
Intel Microcode vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 ESM
Summary:
Several security issues were fixed in Intel Microcode.
Software Description: - intel-microcode: Processor microcode for Intel CPUs
Details:
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 implement sufficient control flow management. A local attacker could use this to cause a denial of service (system crash). (CVE-2021-0127)
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)
It was discovered that some Intel processors did not completely perform cleanup actions on microarchitectural fill buffers. A local attacker could possibly use this to expose sensitive information. (CVE-2022-21125)
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)
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 (system crash). (CVE-2021-33120)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 ESM: intel-microcode 3.20220510.0ubuntu0.16.04.1+esm1
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-5535-1 CVE-2021-0127, CVE-2021-0145, CVE-2021-0146, CVE-2021-33117, CVE-2021-33120, CVE-2022-21123, CVE-2022-21125, CVE-2022-21127, CVE-2022-21151, CVE-2022-21166
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.