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Vulnerability record · CVE-2023-34058 · published 27 October 2023

CVE-2023-34058: Vmware open vm tools improper verification of cryptographic signature vulnerability

Vmware · Open Vm Tools

VMware Tools contains a SAML token signature bypass vulnerability. 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 0.67% · top 49.9% CWE-347 · Improper verification of cryptographic signature
7.5CVSS 3.1 base score
0.67%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

VMware Tools contains a SAML token signature bypass vulnerability. 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

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

References

LinkTags
http://www.openwall.com/lists/oss-security/2023/10/27/1 Mailing ListPatch
https://lists.debian.org/debian-lts-announce/2023/11/msg00002.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/G7G77Z76CQPGUF7VHRA6O3UFC Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/MQUOFQL2SNNNMKROQ3TZQY4HE Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/WLTKVTRKQW2GD2274H3UOW6XU Mailing ListThird Party Advisory
https://www.debian.org/security/2023/dsa-5543 Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2023-0024.html Vendor Advisory
http://www.openwall.com/lists/oss-security/2023/10/27/1 Mailing ListPatch
https://lists.debian.org/debian-lts-announce/2023/11/msg00002.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/G7G77Z76CQPGUF7VHRA6O3UFC Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/MQUOFQL2SNNNMKROQ3TZQY4HE Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/WLTKVTRKQW2GD2274H3UOW6XU Mailing ListThird Party Advisory
https://www.debian.org/security/2023/dsa-5543 Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2023-0024.html Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2023-34058), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.