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Debian dla-3511 : amd64-microcode - security update
critical Nessus Plugin ID 179074
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Synopsis
The remote Debian host is missing one or more security-related updates.Description
The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3511 advisory.------------------------------------------------------------------------- Debian LTS Advisory DLA-3511-1 [email protected] https://www.debian.org/lts/security/ Jochen Sprickerhof July 31, 2023 https://wiki.debian.org/LTS
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Package : amd64-microcode Version : 3.20230719.1+deb10u1 CVE ID : CVE-2023-20593 Debian Bug : 1041863
Tavis Ormandy discovered that under specific microarchitectural circumstances, a vector register in Zen 2 CPUs may not be written to 0 correctly. This flaw allows an attacker to leak register contents across concurrent processes, hyper threads and virtualized guests.
For details please refer to https://lock.cmpxchg8b.com/zenbleed.html https://github.com/google/security-research/security/advisories/GHSA-v6wh-rxpg-cmm8
The initial microcode release by AMD only provides updates for second generation EPYC CPUs: Various Ryzen CPUs are also affected, but no updates are available yet. Fixes will be provided in a later update once they are released.
For more specific details and target dates please refer to the AMD advisory at https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7008.html
For Debian 10 buster, this problem has been fixed in version 3.20230719.1+deb10u1. Additionally the update contains a fix for CVE-2019-9836.
We recommend that you upgrade your amd64-microcode packages.
For the detailed security status of amd64-microcode please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/amd64-microcode
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: PGP signature
Tenable has extracted the preceding description block directly from the Debian security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade the amd64-microcode packages.See Also
http://www.nessus.org/u?75dfdaf9
https://security-tracker.debian.org/tracker/CVE-2019-9836
Plugin Details
Severity: Critical
ID: 179074
File Name: debian_DLA-3511.nasl
Version: 1.4
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 7/31/2023
Updated: 1/22/2025
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.9
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2019-9836
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 5
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:P/RL:O/RC:C
CVSS Score Source: CVE-2023-20593
CVSS v4
Risk Factor: Critical
Base Score: 9.3
Threat Score: 8.5
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score Source: CVE-2023-20593
Vulnerability Information
CPE: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:amd64-microcode
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 7/31/2023
Vulnerability Publication Date: 6/25/2019
Reference Information
CVE: CVE-2019-9836, CVE-2023-20593