CVE-2020-3991

HIGHCVSS 7.1/10EPSS 0.34%

Last modified

CVE-2020-3991 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. This will result into a denial-of-service condition on the machine where Horizon Client for Windows is installed.

Metrics

CVSS 3.1
7.1/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS Probability
0.34%

25.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
VmwareHorizon Client>= 5.0.0, < 5.5.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3991?
VMware Horizon Client for Windows (5.x before 5.5.0) contains a denial-of-service vulnerability due to a file system access control issue during install time. Successful exploitation of this issue may allow an attacker to overwrite certain admin privileged files through a symbolic link attack at install time. This will result into a denial-of-service condition on the machine where Horizon Client for Windows is installed.
How severe is CVE-2020-3991?
CVE-2020-3991 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3991?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3991?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST