Amazon Linux AMI : microcode_ctl (ALAS-2020-1396)

Low Nessus Plugin ID 138638

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VPR Score: 6.7

Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

A new domain bypass transient execution attack known as Special Register Buffer Data Sampling (SRBDS) has been found. This flaw allows data values from special internal registers to be leaked by an attacker able to execute code on any core of the CPU. An unprivileged, local attacker can use this flaw to infer values returned by affected instructions known to be commonly used during cryptographic operations that rely on uniqueness, secrecy, or both. Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-0543)

Cleanup errors in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
(CVE-2020-0548)

Cleanup errors in some data cache evictions for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-0549)

Solution

Run 'yum update microcode_ctl' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2020-1396.html

Plugin Details

Severity: Low

ID: 138638

File Name: ala_ALAS-2020-1396.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2020/07/20

Updated: 2020/07/22

Dependencies: 12634

Risk Information

Risk Factor: Low

VPR Score: 6.7

CVSS v2.0

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:microcode_ctl, p-cpe:/a:amazon:linux:microcode_ctl-debuginfo, cpe:/o:amazon:linux

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/07/15

Vulnerability Publication Date: 2020/01/28

Reference Information

CVE: CVE-2020-0543, CVE-2020-0548, CVE-2020-0549

ALAS: 2020-1396