Dragonfly's manager makes requests to external endpoints with disabled TLS authentication

Impact

The Manager disables TLS certificate verification in two HTTP clients (figures 3.1 and 3.2). The clients are not configurable, so users have no way to re-enable the verification.

func getAuthToken(ctx context.Context, header http.Header) (string, error) { [skipped]
       client := &http.Client{
             Timeout: defaultHTTPRequesttimeout,
             Transport: &http.Transport{
                    TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
             },
}
[skipped]
}

A Manager processes dozens of preheat jobs. An adversary performs a network-level Man-in-the-Middle attack, providing invalid data to the Manager. The Manager preheats with the wrong data, which later causes a denial of service and file integrity problems.

Patches

• Dragonfy v2.1.0 and above.

Workarounds

There are no effective workarounds, beyond upgrading.

References

A third party security audit was performed by Trail of Bits, you can see the full report.

If you have any questions or comments about this advisory, please email us at [email protected].