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Security Advisories: GSA_kwCzR0hTQS13Mmo1LTNyY3gtdng3eM0y7Q
Sysctls applied to containers with host IPC or host network namespaces can affect the host
Impact
Before setting the sysctls for a pod, the pods namespaces must be unshared (created). However, in cases where the pod is using a host network or IPC namespace, a bug in CRI-O caused the namespace creating tool pinns to configure the sysctls of the host. This allows a malicious user to set sysctls on the host, assuming they have access to hostNetwork and hostIPC.
Any CRI-O cluster after CRI-O 1.18 that drops the infra container
1.22 and 1.23 clusters drop infra container by default, and are thus vulnerable by default.
Patches
CRI-O versions 1.24.0, 1.23.1, 1.22.2, 1.21.5, 1.20.6, 1.19.5 all have the patches.
Workarounds
Users can set manage_ns_lifecycle
to false, which causes the sysctls to be configured by the OCI runtime, which typically filter these cases. This option is available in 1.20 and 1.19. Newer versions don't have this option.
An admission webhook could also be created to deny pods that use host IPC or network namespaces and also attempt to configure sysctls related to that namespace.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the CRI-O repo
- To make a report, email your vulnerability to the private
[email protected] list
with the security details and the details expected for all CRI-O bug
reports.
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS13Mmo1LTNyY3gtdng3eM0y7Q
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 2 years ago
Updated: over 1 year ago
Identifiers: GHSA-w2j5-3rcx-vx7x
References:
- https://github.com/cri-o/cri-o/security/advisories/GHSA-w2j5-3rcx-vx7x
- https://github.com/advisories/GHSA-w2j5-3rcx-vx7x
Blast Radius: 0.0
Affected Packages
go:github.com/cri-o/cri-o
Dependent packages: 1Dependent repositories: 61
Downloads:
Affected Version Ranges: >= 1.18.0, < 1.19.5, >= 1.20.0, < 1.20.6, >= 1.21.0, < 1.21.5, >= 1.22.0, < 1.22.2, >= 1.23.0, < 1.23.1
Fixed in: 1.19.5, 1.20.6, 1.21.5, 1.22.2, 1.23.1
All affected versions: 1.18.0, 1.18.1, 1.18.2, 1.18.3, 1.18.4, 1.18.5, 1.18.6, 1.19.0, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.20.0, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.21.0, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.22.0, 1.22.1, 1.23.0
All unaffected versions: 0.0.0, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.8.0, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.8.5, 1.9.0, 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6, 1.9.7, 1.9.8, 1.9.9, 1.9.10, 1.9.11, 1.9.12, 1.9.13, 1.9.14, 1.9.15, 1.9.16, 1.10.0, 1.10.1, 1.10.2, 1.10.3, 1.10.4, 1.10.5, 1.10.6, 1.11.0, 1.11.1, 1.11.2, 1.11.3, 1.11.4, 1.11.5, 1.11.6, 1.11.7, 1.11.8, 1.11.9, 1.11.10, 1.11.11, 1.11.12, 1.11.13, 1.11.14, 1.11.15, 1.12.0, 1.12.1, 1.12.2, 1.12.3, 1.12.4, 1.12.5, 1.12.6, 1.12.7, 1.12.8, 1.12.9, 1.12.10, 1.13.0, 1.13.1, 1.13.2, 1.13.3, 1.13.4, 1.13.5, 1.13.6, 1.13.7, 1.13.8, 1.13.9, 1.13.10, 1.13.11, 1.13.12, 1.14.0, 1.14.1, 1.14.2, 1.14.3, 1.14.4, 1.14.5, 1.14.6, 1.14.7, 1.14.8, 1.14.9, 1.14.10, 1.14.11, 1.14.12, 1.15.0, 1.15.1, 1.15.2, 1.15.3, 1.15.4, 1.16.0, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5, 1.16.6, 1.17.0, 1.17.1, 1.17.2, 1.17.3, 1.17.4, 1.17.5, 1.19.5, 1.19.6, 1.20.6, 1.20.7, 1.20.9, 1.21.5, 1.21.6, 1.21.7, 1.22.2, 1.22.3, 1.22.4, 1.22.5, 1.23.1, 1.23.2, 1.23.3, 1.23.4, 1.23.5, 1.24.0, 1.24.1, 1.24.2, 1.24.3, 1.24.4, 1.24.5, 1.24.6, 1.25.0, 1.25.1, 1.25.2, 1.25.3, 1.25.4, 1.25.5, 1.26.0, 1.26.1, 1.26.2, 1.26.3, 1.26.4, 1.27.0, 1.27.1, 1.27.2, 1.27.3, 1.27.4, 1.28.0, 1.28.1, 1.28.2, 1.28.3, 1.28.4, 1.29.0, 1.29.1, 1.29.2