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Vulnerability record · CVE-2023-20900 · published 31 August 2023

CVE-2023-20900: Vmware tools authentication bypass by capture-replay vulnerability

Vmware · Tools

A malicious actor that has been granted Guest Operation Privileges https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-security/GUID-6A952214-0E5E-4CCF-9D2A-90948FF643EC.html  in a target virtual machine may be able to elevate their privileges if that target virtual machine has been assigned a more privileged Guest Alias https://vdc-download.vmware.com/vmwb-repository/dcr-public/d1902b0e-d479-46bf-8ac9-cee0e31e8ec0/07ce8dbd-db48-4261-9b8f-c6d3ad8ba472/vim.vm.guest.AliasManager.html .

7.5 CVSS 3.1 High EPSS 1.5% · top 26.6% CWE-294 · Authentication bypass by capture-replay
7.5CVSS 3.1 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

A malicious actor that has been granted Guest Operation Privileges https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-security/GUID-6A952214-0E5E-4CCF-9D2A-90948FF643EC.html  in a target virtual machine may be able to elevate their privileges if that target virtual machine has been assigned a more privileged Guest Alias https://vdc-download.vmware.com/vmwb-repository/dcr-public/d1902b0e-d479-46bf-8ac9-cee0e31e8ec0/07ce8dbd-db48-4261-9b8f-c6d3ad8ba472/vim.vm.guest.AliasManager.html .

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2023/08/31/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/27/1 Mailing ListPatch
https://lists.debian.org/debian-lts-announce/2023/10/msg00000.html Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/NVKQ6Y2JFJRWPFOZUOTFO3H27 Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/TJNJMD67QIT6LXLKWSHFM47DC Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/ZJM6HDRQYS74JA7YNKQBFH2XS Mailing List
https://security.netapp.com/advisory/ntap-20231013-0002/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5493 Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2023-0019.html PatchVendor Advisory
http://www.openwall.com/lists/oss-security/2023/08/31/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/27/1 Mailing ListPatch
https://lists.debian.org/debian-lts-announce/2023/10/msg00000.html Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/NVKQ6Y2JFJRWPFOZUOTFO3H27 Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/TJNJMD67QIT6LXLKWSHFM47DC Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/ZJM6HDRQYS74JA7YNKQBFH2XS Mailing List
https://security.netapp.com/advisory/ntap-20231013-0002/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5493 Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2023-0019.html PatchVendor Advisory

Track CVE-2023-20900 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-20900), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.