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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Description
containerd is an industry-standard container runtime and is available as a daemon for Linux and Windows. In containerd before versions 1.3.9 and 1.4.3, the containerd-shim API is improperly exposed to host network containers. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges. This vulnerability has been fixed in containerd 1.3.9 and 1.4.3. Users should update to these versions as soon as they are released. It should be noted that containers started with an old version of containerd-shim should be stopped and restarted, as running containers will continue to be vulnerable even after an upgrade. If you are not providing the ability for untrusted users to start containers in the same network namespace as the shim (typically the "host" network namespace, for example with docker run --net=host or hostNetwork: true in a Kubernetes pod) and run with an effective UID of 0, you are not vulnerable to this issue. If you are running containers with a vulnerable configuration, you can deny access to all abstract sockets with AppArmor by adding a line similar to deny unix addr=@**, to your policy. It is best practice to run containers with a reduced set of privileges, with a non-zero UID, and with isolated namespaces. The containerd maintainers strongly advise against sharing namespaces with the host. Reducing the set of isolation mechanisms used for a container necessarily increases that container's privilege, regardless of what container runtime is used for running that container.
Metrics
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OR
*cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:* versions up to (excluding) 1.3.9
*cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:* versions from (including) 1.4.0 up to (excluding) 1.4.3
Added
CVSS V2
NIST (AV:L/AC:L/Au:N/C:P/I:P/A:N)
Added
CVSS V3.1
NIST AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Added
CWE
NIST CWE-669
Changed
Reference Type
https://github.com/containerd/containerd/commit/4a4bb851f5da563ff6e68a83dc837c7699c469ad No Types Assigned
https://github.com/containerd/containerd/commit/4a4bb851f5da563ff6e68a83dc837c7699c469ad Patch, Third Party Advisory
Changed
Reference Type
https://github.com/containerd/containerd/releases/tag/v1.4.3 No Types Assigned
https://github.com/containerd/containerd/releases/tag/v1.4.3 Third Party Advisory
Changed
Reference Type
https://github.com/containerd/containerd/security/advisories/GHSA-36xw-fx78-c5r4 No Types Assigned
https://github.com/containerd/containerd/security/advisories/GHSA-36xw-fx78-c5r4 Mitigation, Third Party Advisory
Quick Info
CVE Dictionary Entry: CVE-2020-15257 NVD
Published Date: 11/30/2020 NVD
Last Modified: 11/06/2023
Source: GitHub, Inc.