A vulnerability was found in buildah. Incorrect following of symlinks while reading .containerignore and .dockerignore results in information disclosure.
Weakness
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Podman | Podman_project | 4.3.0 (including) | 4.3.0 (including) |
| Red Hat Enterprise Linux 8.8 Extended Update Support | RedHat | container-tools:rhel8-8080020240422101606.0f77c1b7 | * |
| Red Hat Enterprise Linux 9 | RedHat | podman-2:5.2.2-1.el9 | * |
| Golang-github-containers-buildah | Ubuntu | kinetic | * |
| Golang-github-containers-buildah | Ubuntu | lunar | * |
| Golang-github-containers-buildah | Ubuntu | mantic | * |
| Golang-github-containers-buildah | Ubuntu | oracular | * |
| Golang-github-containers-buildah | Ubuntu | plucky | * |
| Golang-github-containers-buildah | Ubuntu | trusty | * |
| Golang-github-containers-buildah | Ubuntu | xenial | * |
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.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/132.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/35.html
- https://cwe.mitre.org/data/definitions/76.html