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.
Published 2020-10-20 17:15:13
Updated 2022-06-15 02:59:52
Source VMware
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionExecute code

Threat overview for CVE-2020-3992

Top countries where our scanners detected CVE-2020-3992
Top open port discovered on systems with this issue 443
IPs affected by CVE-2020-3992 50,257
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2020-3992!
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CVE-2020-3992 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
VMware ESXi OpenSLP Use-After-Free Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
VMware ESXi OpenSLP contains a use-after-free vulnerability that allows an attacker residing in the management network with access to port 427 to perform remote code execution.
Added on 2021-11-03 Action due date 2022-05-03

Exploit prediction scoring system (EPSS) score for CVE-2020-3992

Probability of exploitation activity in the next 30 days: 35.63%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 97 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-3992

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
10.0
HIGH AV:N/AC:L/Au:N/C:C/I:C/A:C
10.0
10.0
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2020-3992

  • Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-3992

Products affected by CVE-2020-3992

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