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Security Advisories: GSA_kwCzR0hTQS03aDhtLXB2dzMtNWdoNM4ABAq9
Rancher allows privilege escalation in Windows nodes due to Insecure Access Control Lists
Impact
A vulnerability has been identified whereby Rancher Manager deployments containing Windows nodes have weak Access Control Lists (ACL), allowing BUILTIN\Users
or NT AUTHORITY\Authenticated Users
to view or edit sensitive files which could lead to privilege escalation.
The affected files include binaries, scripts, configuration and log files:
C:\etc\rancher\wins\config
C:\var\lib\rancher\agent\rancher2_connection_info.json
C:\etc\rancher\rke2\config.yaml.d\50-rancher.yaml
C:\var\lib\rancher\agent\applied\*-*-applied.plan
C:\usr\local\bin\rke2
C:\var\lib\rancher\capr\idempotence\idempotent.sh
RKE2 nodes expand the list to include the files below:
C:\etc\rancher\node\password
C:\var\lib\rancher\rke2\agent\logs\kubelet.log
C:\var\lib\rancher\rke2\data\v1.**.**-rke2r*-windows-amd64-*\bin\*
C:\var\lib\rancher\rke2\bin\*
This vulnerability is exclusive to deployments that contain Windows nodes. Linux-only environments are not affected by it.
Please consult the associated MITRE ATT&CK - Technique - Exploitation for Privilege Escalation for further information about this category of attack.
Patches
Patched versions include Rancher Manager 2.8.9
and 2.9.3
. For RKE2 Windows nodes, please refer to its specific advisory. No patches are available for 2.7, therefore users are urged to upgrade to newer minor versions or to apply the manual workaround below.
Workarounds
Users are advised to upgrade to a patched version of Rancher Manager. When that is not possible, users can enforce stricter ACLs for all sensitive files affected by this Security Advisory running this PowerShell script as an Administrator on each node.
References
For more information
If you have any questions or comments about this advisory:
- Reach out to the SUSE Rancher Security team for security related inquiries.
- Open an issue in the Rancher repository.
- Verify with our support matrix and product support lifecycle.
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS03aDhtLXB2dzMtNWdoNM4ABAq9
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: 2 months ago
Updated: about 2 months ago
CVSS Score: 9.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Identifiers: GHSA-7h8m-pvw3-5gh4, CVE-2023-32197
References:
- https://github.com/rancher/rancher/security/advisories/GHSA-7h8m-pvw3-5gh4
- https://github.com/advisories/GHSA-7h8m-pvw3-5gh4
Blast Radius: 14.6
Affected Packages
go:github.com/rancher/rancher
Dependent packages: 30Dependent repositories: 40
Downloads:
Affected Version Ranges: >= 2.9.0, < 2.9.3, >= 2.7.0, < 2.8.9
Fixed in: 2.9.3, 2.8.9
All affected versions:
All unaffected versions: 0.4.0, 0.4.2, 0.4.3, 0.5.0, 0.6.0, 0.7.0, 0.8.0, 0.9.0, 0.9.1, 0.10.0, 0.10.1, 0.11.0, 0.11.1, 0.12.0, 0.13.0, 0.13.1, 0.14.0, 0.14.1, 0.14.2, 0.15.0, 0.15.1, 0.16.0, 0.16.1, 0.16.2, 0.16.3, 0.17.0, 0.17.1, 0.18.0, 0.18.1, 0.18.2, 0.19.0, 0.19.1, 0.19.2, 0.20.0, 0.20.1, 0.20.2, 0.20.3, 0.20.4, 0.21.0, 0.21.1, 0.21.2, 0.21.3, 0.21.4, 0.24.0, 0.25.0, 0.28.0, 0.30.0, 0.31.0, 0.32.0, 0.34.0, 0.35.0, 0.37.0, 0.37.1, 0.38.0, 0.38.1, 0.39.0, 0.40.0, 0.41.0, 0.42.0, 0.43.0, 0.43.1, 0.44.0, 0.46.0, 0.47.0, 0.49.0, 0.49.1, 0.50.0, 0.50.1, 0.50.2, 0.51.0, 0.56.0, 0.56.1, 0.59.0, 0.59.1, 0.63.0, 0.63.1, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.5.5, 1.5.6, 1.5.7, 1.5.8, 1.5.9, 1.5.10, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.6.5, 1.6.6, 1.6.7, 1.6.8, 1.6.9, 1.6.10, 1.6.11, 1.6.12, 1.6.13, 1.6.14, 1.6.15, 1.6.16, 1.6.17, 1.6.18, 1.6.19, 1.6.20, 1.6.21, 1.6.22, 1.6.23, 1.6.24, 1.6.25, 1.6.26, 1.6.27, 1.6.28, 1.6.29, 1.6.30, 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.0.10, 2.0.11, 2.0.12, 2.0.13, 2.0.14, 2.0.15, 2.0.16, 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.1.7, 2.1.8, 2.1.9, 2.1.10, 2.1.11, 2.1.12, 2.1.13, 2.1.14, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6, 2.2.7, 2.2.8, 2.2.9, 2.2.10, 2.2.11, 2.2.12, 2.2.13