Moderate: microcode_ctl security, bug fix and enhancement update

Synopsis

Moderate: microcode_ctl security, bug fix and enhancement update

Type/Severity

Security Advisory: Moderate

Topic

An update for microcode_ctl is now available for Red Hat enterprise Linux 8.1
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of
Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE
link(s) in the References section.

Description

The microcode_ctl packages provide microcode updates for Intel.

Security Fix(es):

• hw: Information disclosure issue in Intel SGX via RAPL interface (CVE-2020-8695)
  
• hw: Vector Register Leakage-Active (CVE-2020-8696)
  
• hw: Fast forward store predictor (CVE-2020-8698)
  

Bug Fix(es) and Enhancement(s):

• Update Intel CPU microcode to microcode-20201027 release, addresses:
  
• Addition of 06-55-0b/0xbf (CPX-SP A1) microcode at revision 0x700001e;
  
• Addition of 06-8c-01/0x80 (TGL-UP3/UP4 B1) microcode at revision 0x68;
  
• Addition of 06-a5-02/0x20 (CML-H R1) microcode at revision 0xe0;
  
• Addition of 06-a5-03/0x22 (CML-S 6+2 G1) microcode at revision 0xe0;
  
• Addition of 06-a5-05/0x22 (CML-S 10+2 Q0) microcode at revision 0xe0;
  
• Addition of 06-a6-01/0x80 (CML-U 6+2 v2 K0) microcode at revision
  0xe0;
  
• Update of 06-4e-03/0xc0 (SKL-U/U 2+3e/Y D0/K1) microcode (in
  intel-06-4e-03/intel-ucode/06-4e-03) from revision 0xdc up to 0xe2;
  
• Update of 06-55-04/0xb7 (SKX-D/SP/W/X H0/M0/M1/U0) microcode (in
  intel-06-55-04/intel-ucode/06-55-04) from revision 0x2006906 up
  to 0x2006a08;
  
• Update of 06-5e-03/0x36 (SKL-H/S/Xeon E3 N0/R0/S0) microcode (in
  intel-06-5e-03/intel-ucode/06-5e-03) from revision 0xdc up to 0xe2;
  
• Update of 06-8e-09/0x10 (AML-Y 2+2 H0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-8e-09) from revision 0xd6 up
  to 0xde;
  
• Update of 06-8e-09/0xc0 (KBL-U/U 2+3e/Y H0/J1) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-8e-09) from revision 0xd6 up
  to 0xde;
  
• Update of 06-8e-0a/0xc0 (CFL-U 4+3e D0, KBL-R Y0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-8e-0a) from revision 0xd6 up
  to 0xe0;
  
• Update of 06-8e-0b/0xd0 (WHL-U W0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-8e-0b) from revision 0xd6 up
  to 0xde;
  
• Update of 06-8e-0c/0x94 (AML-Y 4+2 V0, CML-U 4+2 V0, WHL-U V0)
  microcode (in intel-06-8e-9e-0x-dell/intel-ucode/06-8e-0c) from
  revision 0xd6 up to 0xde;
  
• Update of 06-9e-09/0x2a (KBL-G/H/S/X/Xeon E3 B0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-9e-09) from revision 0xd6 up
  to 0xde;
  
• Update of 06-9e-0a/0x22 (CFL-H/S/Xeon E U0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-9e-0a) from revision 0xd6 up
  to 0xde;
  
• Update of 06-9e-0b/0x02 (CFL-E/H/S B0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-9e-0b) from revision 0xd6 up
  to 0xde;
  
• Update of 06-9e-0c/0x22 (CFL-H/S/Xeon E P0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-9e-0c) from revision 0xd6 up
  to 0xde;
  
• Update of 06-9e-0d/0x22 (CFL-H/S/Xeon E R0) microcode (in
  intel-06-8e-9e-0x-dell/intel-ucode/06-9e-0d) from revision 0xd6 up
  to 0xde;
  
• Update of 06-3f-02/0x6f (HSX-E/EN/EP/EP 4S C0/C1/M1/R2) microcode
  from revision 0x43 up to 0x44;
  
• Update of 06-55-03/0x97 (SKX-SP B1) microcode from revision 0x1000157
  up to 0x1000159;
  
• Update of 06-55-06/0xbf (CLX-SP B0) microcode from revision 0x4002f01
  up to 0x4003003;
  
• Update of 06-55-07/0xbf (CLX-SP/W/X B1/L1) microcode from revision
  0x5002f01 up to 0x5003003;
  
• Update of 06-5c-09/0x03 (APL D0) microcode from revision 0x38 up
  to 0x40;
  
• Update of 06-5c-0a/0x03 (APL B1/F1) microcode from revision 0x16 up
  to 0x1e;
  
• Update of 06-7a-08/0x01 (GLK-R R0) microcode from revision 0x16 up
  to 0x18;
  
• Update of 06-7e-05/0x80 (ICL-U/Y D1) microcode from revision 0x78
  up to 0xa0;
  
• Update of 06-a6-00/0x80 (CML-U 6+2 A0) microcode from revision 0xca
  up to 0xe0.
  
• Add README file to the documentation directory.
  
• Add publicly-sourced codenames list to supply to gen_provides.sh; update
  the latter to handle the somewhat different format.
  
• Add SUMMARY.intel-ucode file containing metadata information from
  the microcode file headers.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.1 x86_64
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.1 x86_64

Fixes

• BZ - 1828583 - CVE-2020-8695 hw: Information disclosure issue in Intel SGX via RAPL interface
• BZ - 1890355 - CVE-2020-8696 hw: Vector Register Leakage-Active
• BZ - 1890356 - CVE-2020-8698 hw: Fast forward store predictor

CVEs

• CVE-2020-8695
• CVE-2020-8696
• CVE-2020-8698

References

• https://access.redhat.com/security/updates/classification/#moderate