CVE-2024-3056 Podman: kernel: containers in shared ipc namespace are vulnerable to denial of service attack

What is CVE-2024-3056?

CVE-2024-3056 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 2 Aug 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A flaw was found in Podman. This issue may allow an attacker to create a specially crafted container that, when configured to share the same IPC with at least one other container, can create a large number of IPC resources in /dev/shm. The malicious container will continue to exhaust resources until it is out-of-memory (OOM) killed. While the malicious container's cgroup will be removed, the IPC resources it created are not. Those resources are tied to the IPC namespace that will not be removed until all containers using it are stopped, and one non-malicious container is holding the namespace open. The malicious container is restarted, either automatically or by attacker control, repeating the process and increasing the amount of memory consumed. With a container configured to restart always, such as `podman run --restart=always`, this can result in a memory-based denial of service of the system.

Weakness: CWE-400

Which versions are affected by CVE-2024-3056?

15 open source packages ship an affected version, including github.com/containers/podman, github.com/containers/podman/v2 and github.com/containers/podman/v3. It affects 4 products.

Products include Fedoraproject Fedora, Podman Project Podman, Redhat Enterprise Linux, Redhat Openshift Container Platform.

How do I fix CVE-2024-3056?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-3056 being exploited?

There is no known exploitation of CVE-2024-3056 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-49546, AZL-49596, GHSA-rpcc-p8xm-rc6p, GO-2024-3042, MINI-8cv2-gxm6-975c, UBUNTU-CVE-2024-3056.