CVE-2020-3992
CRITICAL severity · CVSS 9.8 · Use-after-free · actively exploited (CISA KEV)
9.8CVSS CRITICAL ● exploited ⚠ ransomware
🔴 Actively exploited in the wild (CISA Known Exploited Vulnerabilities).
⚠ Known use in ransomware campaigns. Added to KEV 2021-11-03. US federal agencies must patch by 2022-05-03.
Summary
OpenSLP as used in VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202010401-SG, 6.5 before ESXi650-202010401-SG) has a use-after-free issue. A malicious actor residing in the management network who has access to port 427 on an ESXi machine may be able to trigger a use-after-free in the OpenSLP service resulting in remote code execution.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)90%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.
Official patch: https://www.vmware.com/security/advisories/VMSA-2020-0023.html ↗
Additional information
- NVD record
- https://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch
- https://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch
- https://www.zerodayinitiative.com/advisories/ZDI-20-1377/Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-1385/Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-1377/Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-1385/Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3992