CVE-2020-15157: containerd can be coerced into leaking credentials during image pull
First published: Wed Oct 14 2020(Updated: )
In containerd (an industry-standard container runtime) before version 1.2.14 there is a credential leaking vulnerability. 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 fixed in containerd 1.2.14. containerd 1.3 and later are not affected. If you are using containerd 1.3 or later, you are not affected. If you are using cri-containerd in the 1.2 series or prior, you should ensure you only pull images from trusted sources. Other container runtimes built on top of containerd but not using the default resolver (such as Docker) are not affected.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/openshift | <0:4.7.0-202102060108.p0.git.97095.7271b90.el8 | 0:4.7.0-202102060108.p0.git.97095.7271b90.el8 |
| Linuxfoundation Containerd | >=1.2.0<1.2.14 | |
| Linuxfoundation Containerd | =1.3.0 | |
| Linuxfoundation Containerd | =1.3.0-beta0 | |
| Linuxfoundation Containerd | =1.3.0-beta1 | |
| Linuxfoundation Containerd | =1.3.0-beta2 | |
| Linuxfoundation Containerd | =1.3.0-rc0 | |
| Linuxfoundation Containerd | =1.3.0-rc1 | |
| Linuxfoundation Containerd | =1.3.0-rc2 | |
| Linuxfoundation Containerd | =1.3.0-rc3 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =20.04 | |
| Debian Debian Linux | =10.0 | |
| redhat/containerd | <1.2.14 | 1.2.14 |
| redhat/containerd | <1.3.0 | 1.3.0 |
| ubuntu/containerd | <1.2.6-0ubuntu1~16.04.4 | 1.2.6-0ubuntu1~16.04.4 |
| ubuntu/docker.io | <19.03.6-0ubuntu1~18.04.2 | 19.03.6-0ubuntu1~18.04.2 |
| ubuntu/docker.io | <19.03.8-0ubuntu1.20.04.1 | 19.03.8-0ubuntu1.20.04.1 |
| ubuntu/docker.io | <18.09.7-0ubuntu1~16.04.6 | 18.09.7-0ubuntu1~16.04.6 |
| debian/containerd | 1.4.13~ds1-1~deb11u4 1.4.13~ds1-1~deb11u2 1.6.20~ds1-1 1.7.18~ds2-1 | |
| debian/docker.io | 20.10.5+dfsg1-1+deb11u2 20.10.24+dfsg1-1 26.1.4+dfsg1-9 26.1.4+dfsg3-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-15157 https://nvd.nist.gov/vuln/detail/CVE-2020-15157 https://github.com/containerd/containerd/releases/tag/v1.2.14 https://github.com/containerd/containerd/security/advisories/GHSA-742w-89gc-8m9c https://www.openwall.com/lists/oss-security/2020/10/15/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1888248
- https://access.redhat.com/errata/RHSA-2020:5634
- https://access.redhat.com/security/cve/cve-2020-15157
- https://github.com/containerd/containerd/security/advisories/GHSA-742w-89gc-8m9c
- https://github.com/containerd/containerd/releases/tag/v1.2.14
- https://usn.ubuntu.com/4589-1/
- https://usn.ubuntu.com/4589-2/
- https://www.debian.org/security/2021/dsa-4865
- https://launchpad.net/bugs/cve/CVE-2020-15157
- https://www.openwall.com/lists/oss-security/2020/10/15/1
- https://github.com/containerd/containerd/commit/1ead8d9deb3b175bf40413b8c47b3d19c2262726
- https://security-tracker.debian.org/tracker/CVE-2020-15157
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1890620
- https://ubuntu.com/security/notices/USN-4589-1
- https://ubuntu.com/security/notices/USN-4589-2
- https://www.cve.org/CVERecord?id=CVE-2020-15157
- https://nvd.nist.gov/vuln/detail/CVE-2020-15157
- https://ubuntu.com/security/CVE-2020-15157
Frequently Asked Questions
What is CVE-2020-15157?
CVE-2020-15157 is a vulnerability found in containerd where credentials may be leaked during an image pull.
What is the severity of CVE-2020-15157?
The severity of CVE-2020-15157 is medium, with a CVSS score of 6.1.
Which software versions are affected by CVE-2020-15157?
Containerd versions before 1.2.14 and 1.3.0 are affected by CVE-2020-15157.
How can I fix CVE-2020-15157?
To fix CVE-2020-15157, upgrade containerd to version 1.2.14 or higher.
Where can I find more information about CVE-2020-15157?
You can find more information about CVE-2020-15157 at the following references: [link1], [link2], [link3].
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