VMware ESXi/Workstation/Fusion PVNVRAM use after free

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.06

A vulnerability was found in VMware ESXi, Workstation and Fusion (Virtualization Software) (affected version unknown). It has been declared as critical. Affected by this vulnerability is an unknown code of the component PVNVRAM. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-416. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

VMware ESXi (7.0 before ESXi_7.0.0-1.20.16321839, 6.7 before ESXi670-202006401-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x before 15.5.2), and Fusion (11.x before 11.5.2) contain a use-after-free vulnerability in PVNVRAM. A malicious actor with local access to a virtual machine may be able to read privileged information contained in physical memory.

The weakness was presented 06/25/2020 (Website). The advisory is shared at vmware.com. This vulnerability is known as CVE-2020-3963 since 12/30/2019. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/27/2020).

Upgrading eliminates this vulnerability.

See 157244, 157245, 157274 and 157275 for similar entries.

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VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-416
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

12/30/2019 CVE assigned
06/25/2020 +178 days Advisory disclosed
06/26/2020 +1 days VulDB entry created
10/27/2020 +123 days VulDB last update

Sourcesinfoedit

Vendor: https://www.vmware.com/

Advisory: vmware.com
Status: Not defined
Confirmation: 🔒

CVE: CVE-2020-3963 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20060413
See also: 🔒

Entryinfoedit

Created: 06/26/2020 12:44 PM
Updated: 10/27/2020 09:37 AM
Changes: (1) advisory_confirm_url
Complete: 🔍

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