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Exploited vulnerability · CISA KEV

Is CVE-2020-3950 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · VMware Multiple Products · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-3950, VMware Multiple Products Privilege Escalation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 596 days after it was published. It affects VMware Multiple Products. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSStop 10%more likely than most to be exploited
severity7.8CVSS 3.1 · high
US federal due3 May 2022BOD 22-01 deadline

What it is

VMware Fusion, Remote Console (VMRC) for Mac, and Horizon Client for Mac contain a privilege escalation vulnerability due to improper use of setuid binaries that allows attackers to escalate privileges to root.

VendorVMware (26 exploited CVEs in KEV)
ProductMultiple Products
VulnerabilityVMware Multiple Products Privilege Escalation Vulnerability
WeaknessCWE-269
Published17 Mar 2020
Added to KEV3 Nov 2021
Reported by (CNA)vmware

What to do

  1. Check whether you run it. Look for Multiple Products in your asset inventory, including appliances and cloud images. Stack check lists every exploited VMware CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 17 Mar 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for VMware.

Other exploited CVEs in Multiple Products

References

Questions

Is CVE-2020-3950 being exploited?

Yes. CISA added CVE-2020-3950 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-3950 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-3950?

Apply updates per vendor instructions. Check VMware's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Multiple Products and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · VMware scorecard · act-now radar.

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