CVE Vulnerabilities

CVE-2020-3982

Time-of-check Time-of-use (TOCTOU) Race Condition

Published: Oct 20, 2020 | Modified: Nov 21, 2024
CVSS 3.x
7.7
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:H
CVSS 2.x
4.9 MEDIUM
AV:N/AC:M/Au:S/C:N/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202008101-SG, 6.5 before ESXi650-202007101-SG), Workstation (15.x), Fusion (11.x before 11.5.6) contain an out-of-bounds write vulnerability due to a time-of-check time-of-use issue in ACPI device. A malicious actor with administrative access to a virtual machine may be able to exploit this vulnerability to crash the virtual machines vmx process or corrupt hypervisors memory heap.

Weakness

The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check.

Affected Software

Name Vendor Start Version End Version
Esxi Vmware 7.0.0 (including) 7.0.0 (including)
Esxi Vmware 7.0.0-1.20.16321839 (including) 7.0.0-1.20.16321839 (including)

Potential Mitigations

References