VulnerabilityAnalyzed
CVE-2020-3992
VMware ESXi OpenSLP Use-After-Free Vulnerability
KEVCRITICAL 9.8EPSS 83.0%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 83.02% probability · 100th percentile
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022 · used in ransomware campaigns
- Weakness
- CWE-416
- Affected
- vmware/cloud foundation · vmware/esxi
- Source
- security@vmware.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2020-3992
References
- https://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-1377/Third Party Advisory, VDB Entry
- https://www.zerodayinitiative.com/advisories/ZDI-20-1385/Third Party Advisory, VDB Entry
- https://www.vmware.com/security/advisories/VMSA-2020-0023.htmlPatch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-1377/Third Party Advisory, VDB Entry
- https://www.zerodayinitiative.com/advisories/ZDI-20-1385/Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3992US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.