What’s Vulnerable › Vulnerabilities
CVE-2023-34058
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-10-27 · updated 2026-06-17
- Weakness: CWE-347
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 .
Affected products
- Debian Linux: 10.0, 11.0, 12.0
- Fedoraproject Fedora: 37, 38, 39
- VMware Open Vm Tools: from 11.0.0 through 12.3.0
- VMware Tools: from 10.3.0 before 12.3.5 — fixed in 12.3.5
- open-vm-tools: from 11.0.0 through 12.3.0
- VMware Tools: 12.x.x, 11.x.x, 10.3.x
How to fix
Upgrade to a fixed version: VMware Tools 12.3.5. Check the vendor advisory for mitigations.
References
- http://www.openwall.com/lists/oss-security/2023/10/27/1
- https://lists.debian.org/debian-lts-announce/2023/11/msg00002.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G7G77Z76CQPGUF7VHRA6O3UFCMPPR4O2/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQUOFQL2SNNNMKROQ3TZQY4HEYMNOIBW/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WLTKVTRKQW2GD2274H3UOW6XU4E62GSK/
- https://www.debian.org/security/2023/dsa-5543
- https://www.vmware.com/security/advisories/VMSA-2023-0024.html
- http://www.openwall.com/lists/oss-security/2023/10/27/1
- https://lists.debian.org/debian-lts-announce/2023/11/msg00002.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G7G77Z76CQPGUF7VHRA6O3UFCMPPR4O2/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQUOFQL2SNNNMKROQ3TZQY4HEYMNOIBW/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WLTKVTRKQW2GD2274H3UOW6XU4E62GSK/
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