Docker before 1.3.1 and docker-py before 0.5.3 fall back to HTTP when the HTTPS connection to the registry fails, which allows man-in-the-middle attackers to conduct downgrade attacks and obtain authentication and image data by leveraging a network position between the client and the registry to block HTTPS traffic.
{
"nvd_published_at": null,
"cwe_ids": [],
"severity": "MODERATE",
"github_reviewed": true,
"github_reviewed_at": "2021-05-13T21:41:48Z"
}