containerd is an open-source container runtime. Versions prior to 2.3.2, 2.2.5 and 2.1.9 contain a bug 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. This issue has been fixed in versions 2.3.2, 2.2.5 and 2.1.9.
Weakness
The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Containerd | Linuxfoundation | 2.1.0 (including) | 2.1.9 (excluding) |
| Containerd | Linuxfoundation | 2.2.0 (including) | 2.2.5 (excluding) |
| Containerd | Linuxfoundation | 2.3.0 (including) | 2.3.2 (excluding) |
| Red Hat Hardened Images | RedHat | trivy-main-0.69.3-1.2.hum1 | * |
| Red Hat Hardened Images | RedHat | grype-main-0.115.0-0.1.hum1 | * |
| Red Hat Hardened Images | RedHat | syft-main-1.46.0-0.1.hum1 | * |
| Containerd-app | Ubuntu | devel | * |
| Containerd-app | Ubuntu | esm-apps/jammy | * |
| Containerd-app | Ubuntu | jammy | * |
| Containerd-app | Ubuntu | noble | * |
| Containerd-app | Ubuntu | questing | * |
| Containerd-app | Ubuntu | resolute | * |
| Containerd-app | Ubuntu | upstream | * |
| Containerd-stable | Ubuntu | devel | * |
| Containerd-stable | Ubuntu | questing | * |
| Containerd-stable | Ubuntu | resolute | * |
| Containerd-stable | Ubuntu | upstream | * |
Potential Mitigations
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.