Affected: Go: github.com/docker/docker

A security vulnerability has been detected in certain versions of Docker Engine, which could allow an attacker to bypass [authorization plugins (AuthZ)](https://docs.docker.com/engine/extend/plugins_authorization/) under specific circumstances. The base likelihood of this being exploited is low. This advisory outlines the issue, identifies the affected versions, and provides remediation steps for impacted users.

### Impact

Using a specially-crafted API request, an Engine API client could make the daemon forward the request or response to an [authorization plugin](https://docs.docker.com/engine/extend/plugins_authorization/) without the body. In certain circumstances, the authorization plugin may allow a request which it would have otherwise denied if the body had been forwarded to it.

A security issue was discovered In 2018, where an attacker could bypass AuthZ plugins using a specially crafted API request. This could lead to unauthorized actions, including privilege escalation. Although this issue was fixed in Docker Engine [v18.09.1](https://docs.docker.com/engine/release-notes/18.09/#security-fixes-1) in January 2019, the fix was not carried forward to later major versions, resulting in a regression. Anyone who depends on authorization plugins that introspect the request and/or response body to make access control decisions is potentially impacted.

Docker EE v19.03.x and all versions of Mirantis Container Runtime **are not vulnerable.**

### Vulnerability details

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