# CVE-2023-20900: Privilege escalation in VMware Tools > A guest user with specific privileges can escalate permissions within a virtual machine if a privileged Guest Alias is assigned. - **Severity:** High 7.1 (`CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 31 Aug 2023 - **Updated:** 8 Oct 2026 - **Also known as:** ALSA-2023:5312, ALSA-2023:5313, DEBIAN-CVE-2023-20900, DLA-3597-1, GHSA-h7h7-f9wh-xhj8, RHSA-2023:5210, RHSA-2023:5213, RHSA-2023:5216, RHSA-2023:5217, RHSA-2023:5218, RHSA-2023:5220, RHSA-2023:5312, RHSA-2023:5313, RHSA-2024:5315, RLSA-2023:5312, RLSA-2023:5313, SUSE-SU-2023:3506-1, SUSE-SU-2023:3507-1, SUSE-SU-2023:3795-1, SUSE-SU-2023:3835-1, UBUNTU-CVE-2023-20900, USN-6365-1, USN-6365-2, openSUSE-SU-2024:13186-1 ## What is CVE-2023-20900? CVE-2023-20900 is a high-severity vulnerability in Debian Debian Linux, published on 31 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim. ### Official 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 . Weakness: CWE-294 (Authentication Bypass by Capture-replay) ## Which versions are affected by CVE-2023-20900? It affects 5 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `open-vm-tools` | AlmaLinux:8 | All versions | 12.1.5-2.el8_8.3.alma.1 | | `open-vm-tools-desktop` | AlmaLinux:8 | All versions | 12.1.5-2.el8_8.3.alma.1 | | `open-vm-tools-salt-minion` | AlmaLinux:8 | All versions | 12.1.5-2.el8_8.3.alma.1 | | `open-vm-tools-sdmp` | AlmaLinux:8 | All versions | 12.1.5-2.el8_8.3.alma.1 | | `open-vm-tools` | AlmaLinux:9 | All versions | 12.1.5-1.el9_2.3.alma.1 | | `open-vm-tools-desktop` | AlmaLinux:9 | All versions | 12.1.5-1.el9_2.3.alma.1 | | `open-vm-tools-salt-minion` | AlmaLinux:9 | All versions | 12.1.5-1.el9_2.3.alma.1 | | `open-vm-tools-sdmp` | AlmaLinux:9 | All versions | 12.1.5-1.el9_2.3.alma.1 | | `open-vm-tools-test` | AlmaLinux:9 | All versions | 12.1.5-1.el9_2.3.alma.1 | | `open-vm-tools` | Red Hat:enterprise_linux:7::client | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-desktop` | Red Hat:enterprise_linux:7::client | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-test` | Red Hat:enterprise_linux:7::client | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-test` | Red Hat:enterprise_linux:7::computenode | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools` | Red Hat:enterprise_linux:7::server | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-desktop` | Red Hat:enterprise_linux:7::server | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-devel` | Red Hat:enterprise_linux:7::server | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-test` | Red Hat:enterprise_linux:7::server | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools` | Red Hat:enterprise_linux:7::workstation | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-debuginfo` | Red Hat:enterprise_linux:7::workstation | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-desktop` | Red Hat:enterprise_linux:7::workstation | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-devel` | Red Hat:enterprise_linux:7::workstation | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools-test` | Red Hat:enterprise_linux:7::workstation | All versions | 0:11.0.5-3.el7_9.7 | | `open-vm-tools` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-debugsource` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-desktop` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-desktop-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-salt-minion` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-sdmp` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-sdmp-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools-test-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:12.1.5-2.el8_8.3 | | `open-vm-tools` | Red Hat:enterprise_linux:9::appstream | All versions | 0:12.1.5-1.el9_2.3 | | `open-vm-tools-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:12.1.5-1.el9_2.3 | | `open-vm-tools-debugsource` | Red Hat:enterprise_linux:9::appstream | All versions | 0:12.1.5-1.el9_2.3 | | `open-vm-tools-desktop` | Red Hat:enterprise_linux:9::appstream | All versions | 0:12.1.5-1.el9_2.3 | Products: Debian Debian Linux, Fedoraproject Fedora, Netapp Ontap Select Deploy Administration Utility, Vmware Open Vm Tools, Vmware Tools. ## How do I fix CVE-2023-20900? Apply the vendor's patch. ## Is CVE-2023-20900 being exploited? There is no known exploitation of CVE-2023-20900 in the wild and no public exploit code. ## Other vulnerabilities in Debian Debian Linux - [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild) - [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild) - [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild) - [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild) - [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2023-20900 and fix it if it is affected. What it is: CVE-2023-20900 is a high-severity vulnerability in Debian Debian Linux, published on 31 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2023-20900 in the wild and no public exploit code. Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2023-20900/ (Markdown: https://insights.sbomify.com/CVE-2023-20900/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20900 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20900 - OSV: https://osv.dev/vulnerability/CVE-2023-20900 --- From sbomify Insights: https://insights.sbomify.com/CVE-2023-20900/ Summaries are generated and may contain mistakes; the official description above is the record.