GHSA-rgh6-rfwx-v388

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GHSA-rgh6-rfwx-v388

Summary: Arbitrary host CRI log file read via symlink following in CRI checkpoint restore

Details: ### Impact A bug was found in containerd where the CRI plugin restores `container.log` from a checkpoint image without validating a symlinked path. This could result in reading an arbitrary file on the host via `kubectl logs`. ### Patches This bug has been fixed in the following containerd versions: * 2.3.2 * 2.2.5 * 2.1.9 Users should update to these versions to resolve the issue. ### Workarounds Ensure that only trusted images and checkpoints are used. ### Credits The containerd project would like to thank @gouldnicholas and @davidrxchester, Yuming Zhang and Song Li of Zhejiang University, Sangwon Ryu (@sangwon090), Henry Beberman (@hbeberman) of Microsoft, the GKE Security Team using Gemini, Anthropic Research, in collaboration with Claude, Robert Prast (@robertprast), Kyle Elliott (@kyle-elliott-tob) of Trail of Bits, and Zhenchen Wang (@Plucky923), who independently discovered and responsibly disclosed this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/main/SECURITY.md). ### For more information If you have any questions or comments about this advisory: * Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose) * Email us at [[email protected]](mailto:[email protected]) To report a security issue in containerd: * [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new) * Email us at [[email protected]](mailto:[email protected])

References: https://github.com/containerd/containerd/security/advisories/GHSA-rgh6-rfwx-v388, https://github.com/containerd/containerd