6.8 Medium
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5 Medium
AI Score
Confidence
High
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
27.6%
Issue Overview:
A flaw was found in microcode. Under complex microarchitectural conditions, an unexpected code breakpoint may cause a system hang. The hang was observed on a Skylake server processor, and subsequent analysis indicated additional potentially affected processors. This flaw allows a possible temporary denial of service (TDOS) to occur. (CVE-2021-0127)
Hardware allows activation of test and debug logic at runtime for some Intel® processors which may allow an unauthenticated user to potentially enable escalation of privilege via physical access. (CVE-2021-0146)
Affected Packages:
microcode_ctl
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update microcode_ctl to update your system.
New Packages:
i686:
microcode_ctl-2.1-47.amzn2.0.11.i686
microcode_ctl-debuginfo-2.1-47.amzn2.0.11.i686
src:
microcode_ctl-2.1-47.amzn2.0.11.src
x86_64:
microcode_ctl-2.1-47.amzn2.0.11.x86_64
microcode_ctl-debuginfo-2.1-47.amzn2.0.11.x86_64
Red Hat: CVE-2021-0127, CVE-2021-0146
Mitre: CVE-2021-0127, CVE-2021-0146
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | i686 | microcode_ctl | < 2.1-47.amzn2.0.11 | microcode_ctl-2.1-47.amzn2.0.11.i686.rpm |
Amazon Linux | 2 | i686 | microcode_ctl-debuginfo | < 2.1-47.amzn2.0.11 | microcode_ctl-debuginfo-2.1-47.amzn2.0.11.i686.rpm |
Amazon Linux | 2 | x86_64 | microcode_ctl | < 2.1-47.amzn2.0.11 | microcode_ctl-2.1-47.amzn2.0.11.x86_64.rpm |
Amazon Linux | 2 | x86_64 | microcode_ctl-debuginfo | < 2.1-47.amzn2.0.11 | microcode_ctl-debuginfo-2.1-47.amzn2.0.11.x86_64.rpm |
6.8 Medium
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5 Medium
AI Score
Confidence
High
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
27.6%