CVE-2020-3992: VMware ESXi OpenSLP Use-After-Free Vulnerability

CVE-2020-3992 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

OpenSLP as used in VMware ESXi contains a use-after-free vulnerability in the OpenSLP service. A remote attacker with access to port 427 on the management network can exploit this to execute arbitrary code on the host.

Technologies: VMware ESXi. Vendors: VMware.

Quick answers

Is CVE-2020-3992 exploited in the wild?
Yes. CVE-2020-3992 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-3992?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
VMware ESXi 7.0 before ESXi_7.0.1-0.0.16850804; VMware ESXi 6.7 before ESXi670-202010401-SG; VMware ESXi 6.5 before ESXi650-202010401-SG.
Is there a fix for CVE-2020-3992?
A patch was published on 2020-10-20: Vendor released patches for ESXi 6.5, 6.7, and 7.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2020-3992 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2020-3992?
Check whether you run VMware ESXi. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • VMware ESXi 7.0 before ESXi_7.0.1-0.0.16850804
  • VMware ESXi 6.7 before ESXi670-202010401-SG
  • VMware ESXi 6.5 before ESXi650-202010401-SG

Timeline

  • 2020-10-20: patched: Vendor released patches for ESXi 6.5, 6.7, and 7.0.
  • 2021-11-03: disclosed: NVD publication date.
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
  • 2021-11-03: exploited: Confirmed as exploited in the wild per CISA KEV catalog.

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