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Security Advisory - The L1D vulnerabilities of Intel processor

  • SA No INSPUR-SA-201905-001
  • Initial Release Date 2020-05-22 16:37:53
  • last Release Date 2020-05-22 16:45:36
  • Source Intel Security Advisory
  • Potential Security Impact Local: Disclosure of Information
Vulnerability Summary

On January 27, 2020, intel released a security update that disclosed two security vulnerabilities of Intel processors that could lead to information disclosure. CVE numbers are CVE-2020-0548 and CVE-2020-0549. Intel will be providing fixes in future microcode updates. The vulnerability details are as follows:
CVE-2020-0549:L1D Eviction Sampling
On some processors under certain microarchitectural conditions, data from the most recently evicted modified L1 data cache (L1D) line may be propagated into an unused (invalid) L1D fill buffer. On processors affected by Microarchitectural Data Samping (MDS) or Transactional Asynchronous Abort (TAA), data from an L1D fill buffer may be inferred using one of these data sampling side channel methods. By combining these two behaviors together, it may be possible for a malicious actor to infer data values from modified cache lines that were previously evicted from the L1 data cache. This is called L1D eviction sampling.
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. This vulnerability has been assigned CVE-2020-0549 with a CVSS of 2.8.
Inspur started the relevant investigation work in the first time. Inspur will be working closely with Intel to provide security updates. Inspur PSIRT will update the security notice at any time. Please keep an eye on the security bulletin for this incident.
The affected products and corresponding update versions are shown in the table below.

Vulnerability Scoring Details
CVE V3.1 Vector(Base) Base Score V3.1 Vector(Temporal Score) Temporal Score
CVE-2020-0549 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N 5.5 E:U/RL:O/RC:C 4.8
CVE-2020-0548 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N 5.5 E:U/RL:O/RC:C 4.8

Fixed Product Version
Product BIOS Update version
SN5161M5 SN5161M5_BIOS_4.1.04_Standard_20200228
TS860M5 TS860M5_BIOS_4.1.11_Standard_20200303
NS5162M5 NS5162M5_BIOS_4.1.10_Standard_20200429
NF5468M5 NF5468M5_BIOS_4.1.14_Standard_20200327

Resolution

Inspur provides method to update CPU Microcode of its various products as mentioned in the table above.Download your product’s corresponding BIOS image and perform the BIOS upgrade.
Please visit the Support and Downloads site for updates on the applicable products.

Revision History

 20200522-V1.0-Initl Release

References
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