# Security update for kernel-firmware

Announcement ID: SUSE-SU-2023:4655-1  
Rating: important  
References:

  * bsc#1215823
  * bsc#1215831

  
Cross-References:

  * CVE-2021-26345
  * CVE-2021-46766
  * CVE-2021-46774
  * CVE-2022-23820
  * CVE-2022-23830
  * CVE-2023-20519
  * CVE-2023-20521
  * CVE-2023-20526
  * CVE-2023-20533
  * CVE-2023-20566
  * CVE-2023-20592

  
CVSS scores:

  * CVE-2021-26345 ( SUSE ):  1.6 CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
  * CVE-2021-26345 ( NVD ):  4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
  * CVE-2021-46766 ( SUSE ):  2.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N
  * CVE-2021-46766 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  * CVE-2021-46774 ( SUSE ):  6.7 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:L
  * CVE-2021-46774 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2022-23820 ( SUSE ):  7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
  * CVE-2022-23820 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2022-23830 ( SUSE ):  1.9 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
  * CVE-2022-23830 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2023-20519 ( SUSE ):  6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
  * CVE-2023-20519 ( NVD ):  3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
  * CVE-2023-20521 ( SUSE ):  3.3 CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:L
  * CVE-2023-20521 ( NVD ):  5.7 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
  * CVE-2023-20526 ( SUSE ):  1.9 CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N
  * CVE-2023-20526 ( NVD ):  4.6 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2023-20533 ( SUSE ):  6.1 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H
  * CVE-2023-20533 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-20566 ( SUSE ):  5.3 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N
  * CVE-2023-20566 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  * CVE-2023-20592 ( SUSE ):  5.3 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N
  * CVE-2023-20592 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves 11 vulnerabilities can now be installed.

## Description:

This update for kernel-firmware fixes the following issues:

Update AMD ucode to 20231030 (bsc#1215831):

  * CVE-2022-23820: Failure to validate the AMD SMM communication buffer may
    allow an attacker to corrupt the SMRAM potentially leading to arbitrary code
    execution.
  * CVE-2021-46774: Insufficient input validation in ABL may enable a privileged
    attacker to perform arbitrary DRAM writes, potentially resulting in code
    execution and privilege escalation.
  * CVE-2023-20533: Insufficient DRAM address validation in System Management
    Unit (SMU) may allow an attacker using DMA to read/write from/to invalid
    DRAM address potentially resulting in denial-of-service. 0 CVE-2023-20519: A
    Use-After-Free vulnerability in the management of an SNP guest context page
    may allow a malicious hypervisor to masquerade as the guest's migration
    agent resulting in a potential loss of guest integrity.
  * CVE-2023-20566: Improper address validation in ASP with SNP enabled may
    potentially allow an attacker to compromise guest memory integrity.
  * CVE-2023-20521: TOCTOU in the ASP Bootloader may allow an attacker with
    physical access to tamper with SPI ROM records after memory content
    verification, potentially leading to loss of confidentiality or a denial of
    service.
  * CVE-2021-46766: Improper clearing of sensitive data in the ASP Bootloader
    may expose secret keys to a privileged attacker accessing ASP SRAM,
    potentially leading to a loss of confidentiality.
  * CVE-2022-23830: SMM configuration may not be immutable, as intended, when
    SNP is enabled resulting in a potential limited loss of guest memory
    integrity.
  * CVE-2023-20526: Insufficient input validation in the ASP Bootloader may
    enable a privileged attacker with physical access to expose the contents of
    ASP memory potentially leading to a loss of confidentiality.
  * CVE-2021-26345: Failure to validate the value in APCB may allow an attacker
    with physical access to tamper with the APCB token to force an out-of-bounds
    memory read potentially resulting in a denial of service.
  * CVE-2023-20592: Issue with INVD instruction aka CacheWarpAttack
    (bsc#1215823).

## Special Instructions and Notes:

  * Please reboot the system after installing this update.

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise High Performance Computing 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-4655=1

  * SUSE Linux Enterprise Server 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-4655=1

  * SUSE Linux Enterprise Server for SAP Applications 12 SP5  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-2023-4655=1

## Package List:

  * SUSE Linux Enterprise High Performance Computing 12 SP5 (noarch)
    * kernel-firmware-20190618-5.34.1
    * ucode-amd-20190618-5.34.1
  * SUSE Linux Enterprise Server 12 SP5 (noarch)
    * kernel-firmware-20190618-5.34.1
    * ucode-amd-20190618-5.34.1
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5 (noarch)
    * kernel-firmware-20190618-5.34.1
    * ucode-amd-20190618-5.34.1

## References:

  * https://www.suse.com/security/cve/CVE-2021-26345.html
  * https://www.suse.com/security/cve/CVE-2021-46766.html
  * https://www.suse.com/security/cve/CVE-2021-46774.html
  * https://www.suse.com/security/cve/CVE-2022-23820.html
  * https://www.suse.com/security/cve/CVE-2022-23830.html
  * https://www.suse.com/security/cve/CVE-2023-20519.html
  * https://www.suse.com/security/cve/CVE-2023-20521.html
  * https://www.suse.com/security/cve/CVE-2023-20526.html
  * https://www.suse.com/security/cve/CVE-2023-20533.html
  * https://www.suse.com/security/cve/CVE-2023-20566.html
  * https://www.suse.com/security/cve/CVE-2023-20592.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1215823
  * https://bugzilla.suse.com/show_bug.cgi?id=1215831