# CVE-2020-15157: docker.io: In containerd (an industry-standard container runtime) before version 1.2.14 there is a credential leaking vulnerability

CVE-2020-15157 is fixed in 4 products on 1 platform, first by docker.io 19.03.6-0ubuntu1~18.04.2, released October 14, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-15157
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0230
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 14, 2020

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | docker.io Ubuntu 18.04.6 LTS (bionic) | 19.03.6-0ubuntu1~18.04.2 | [docker.io 19.03.6-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-docker.io-19.03.6-0ubuntu1-18.04.2.md) | Oct 14, 2020 |
| Linux | docker.io Ubuntu 20.04 LTS (focal) | 19.03.8-0ubuntu1.20.04.1 | [docker.io 19.03.8-0ubuntu1.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-docker.io-19.03.8-0ubuntu1.20.04.1.md) | Oct 14, 2020 |
| Linux | golang-docker-dev Ubuntu 18.04.6 LTS (bionic) | 19.03.6-0ubuntu1~18.04.2 | [golang-docker-dev 19.03.6-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-golang-docker-dev-19.03.6-0ubuntu1-18.04.2.md) | Oct 14, 2020 |
| Linux | golang-docker-dev Ubuntu 20.04 LTS (focal) | 19.03.8-0ubuntu1.20.04.1 | [golang-docker-dev 19.03.8-0ubuntu1.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-golang-docker-dev-19.03.8-0ubuntu1.20.04.1.md) | Oct 14, 2020 |
| Linux | golang-github-docker-docker-dev Ubuntu 18.04.6 LTS (bionic) | 19.03.6-0ubuntu1~18.04.2 | [golang-github-docker-docker-dev 19.03.6-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-golang-github-docker-docker-dev-19.03.6-0ubuntu1-18.04.2.md) | Oct 14, 2020 |
| Linux | golang-github-docker-docker-dev Ubuntu 20.04 LTS (focal) | 19.03.8-0ubuntu1.20.04.1 | [golang-github-docker-docker-dev 19.03.8-0ubuntu1.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-golang-github-docker-docker-dev-19.03.8-0ubuntu1.20.04.1.md) | Oct 14, 2020 |
| Linux | vim-syntax-docker Ubuntu 18.04.6 LTS (bionic) | 19.03.6-0ubuntu1~18.04.2 | [vim-syntax-docker 19.03.6-0ubuntu1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vim-syntax-docker-19.03.6-0ubuntu1-18.04.2.md) | Oct 14, 2020 |
| Linux | vim-syntax-docker Ubuntu 20.04 LTS (focal) | 19.03.8-0ubuntu1.20.04.1 | [vim-syntax-docker 19.03.8-0ubuntu1.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vim-syntax-docker-19.03.8-0ubuntu1.20.04.1.md) | Oct 14, 2020 |

---

Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.