containerd v1.2.x can be coerced into leaking credentials during image pull
Summary
containerd v1.2.x can be coerced into leaking credentials during image pull
Original description
The description as published by the source.
Impact
If a container image manifest in the OCI Image format or Docker Image V2 Schema 2 format includes a URL for the location of a specific image layer (otherwise known as a “foreign layer”), the default containerd resolver will follow that URL to attempt to download it. In v1.2.x but not 1.3.0 or later, the default containerd resolver will provide its authentication credentials if the server where the URL is located presents an HTTP 401 status code along with registry-specific HTTP headers.
If an attacker publishes a public image with a manifest that directs one of the layers to be fetched from a web server they control and they trick a user or system into pulling the image, they can obtain the credentials used for pulling that image. In some cases, this may be the user's username and password for the registry. In other cases, this may be the credentials attached to the cloud virtual instance which can grant access to other cloud resources in the account.
The default containerd resolver is used by the cri-containerd plugin (which can be used by Kubernetes), the ctr development tool, and other client programs that have explicitly linked against it.
This vulnerability has been rated by the containerd maintainers as medium, with a CVSS score of 6.1 and a vector string of CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N.
Patches
This vulnerability has been fixed in containerd 1.2.14. containerd 1.3 and later are not affected.
Workarounds
If you are using containe…
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2020-15157 containerd Fixed in: 1.3.2~ds1-2
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web darkbit.io
- web github.com
- web usn.ubuntu.com
- web usn.ubuntu.com
- web debian.org