RHSA-2021:3255 - Security Advisory

Topic

An update for microcode_ctl is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Important. 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: Special Register Buffer Data Sampling (SRBDS) (CVE-2020-0543)
• hw: Vector Register Data Sampling (CVE-2020-0548)
• hw: L1D Cache Eviction Sampling (CVE-2020-0549)
• hw: vt-d related privilege escalation (CVE-2020-24489)
• hw: improper isolation of shared resources in some Intel Processors (CVE-2020-24511)
• hw: observable timing discrepancy in some Intel Processors (CVE-2020-24512)
• 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)

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 Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - TUS 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64

Fixes

• BZ - 1788786 - CVE-2020-0548 hw: Vector Register Data Sampling
• BZ - 1788788 - CVE-2020-0549 hw: L1D Cache Eviction Sampling
• BZ - 1827165 - CVE-2020-0543 hw: Special Register Buffer Data Sampling (SRBDS)
• 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
• BZ - 1962650 - CVE-2020-24489 hw: vt-d related privilege escalation
• BZ - 1962702 - CVE-2020-24511 hw: improper isolation of shared resources in some Intel Processors
• BZ - 1962722 - CVE-2020-24512 hw: observable timing discrepancy in some Intel Processors
• BZ - 1972334 - [rhel-7.4.z] Re-enable 06-5e-03 (SKL-H/S, CPUID 0x506e3) latest microcode updates

CVEs

• CVE-2020-0543
• CVE-2020-0548
• CVE-2020-0549
• CVE-2020-8695
• CVE-2020-8696
• CVE-2020-8698
• CVE-2020-24489
• CVE-2020-24511
• CVE-2020-24512

References

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