Auth bypass in VMware Horizon Daas

CVE-2020-3977

VMware Horizon DaaS (7.x and 8.x before 8.0.1 Update 1) contains a broken authentication vulnerability due to a flaw in the way it handled the first factor authentication. Successful exploitation of this issue may allow an attacker to bypass two-factor authentication process. In order to exploit this issue, an attacker must have a legitimate account on Horizon DaaS.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-3977: held from 0.010 to 0.010.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

  • VMware Horizon Daas — versions 7.0.0
  • VMware Horizon Daas — versions VMware Horizon DaaS (7.x and 8.x before 8.0.1 Update 1)

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-3977?
CVE-2020-3977 is a medium-severity vulnerability in VMware Horizon Daas, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2020-09-22.
How severe is CVE-2020-3977?
Medium severity. CVSS v3 base score is 6.5 out of 10.