CVE-2023-34058

moderate-risk

Published 2023-10-27

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 .

Do I need to act?

0.03% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.1/10 High

ADJACENT_NETWORK / HIGH complexity

Affected Products (8)

Open Vm Tools

Debian Linux

Tools

Fedora

Affected Vendors

Debian Vmware Fedoraproject

References (14)

Mailing List http://www.openwall.com/lists/oss-security/2023/10/27/1

Mailing List https://lists.debian.org/debian-lts-announce/2023/11/msg00002.html

Mailing List https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproje...

Third Party Advisory https://www.debian.org/security/2023/dsa-5543

Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2023-0024.html

Mailing List http://www.openwall.com/lists/oss-security/2023/10/27/1

Mailing List https://lists.debian.org/debian-lts-announce/2023/11/msg00002.html

Mailing List https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproje...

Third Party Advisory https://www.debian.org/security/2023/dsa-5543

Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2023-0024.html

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moderate-risk

Severity 18/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 14/34 · Moderate