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The vulnerability exists within the Manager component of Dragonfly. Its HTTP clients are hardcoded to disable TLS certificate verification (InsecureSkipVerify: true). This configuration is not user-configurable. During preheat operations, the Manager fetches data from remote registries using these insecure clients. An adversary with a Man-in-the-Middle (MitM) position can exploit this by intercepting the connection and supplying malicious data to the Manager. This corrupted data is then preheated and distributed, leading to downstream denial of service and critical file integrity issues, as the system operates on untrusted, adversary-supplied content.
Platform: Dragonfly
Version: <2.1.0
Vulnerability: TLS Verification Bypass
Severity: Critical
date: 2022
Prediction: 2022-10-15
What Undercode Say:
Check for the vulnerable Transport configuration grep -r "InsecureSkipVerify.true" /path/to/dragonfly/source/ Simulate a MitM to test for the vulnerability sudo ettercap -T -M arp:remote /target-ip// /gateway-ip// Test connectivity from a Dragonfly node to a malicious endpoint curl -k https://malicious-registry.example.com/v2/
How Exploit:
An adversary performs an ARP spoofing or DNS poisoning attack to achieve a Man-in-the-Middle position between the Dragonfly Manager and the upstream registry. They then intercept the HTTPS connection and present a self-signed certificate. Due to the disabled verification, the Manager accepts this connection. The adversary serves manipulated data, which the Manager pulls and uses for preheating, poisoning the P2P network.
Protection from this CVE:
Upgrade to Dragonfly v2.1.0+. The patch replaces the `InsecureSkipVerify: true` setting with a proper TLS configuration that validates certificate chains. Isolate network segments to limit MitM opportunities as an additional layer of defense.
Impact:
Denial of Service, severe file integrity compromise, and potential supply chain poisoning across the entire P2P network due to the distribution of adversary-controlled, malicious data.
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Sources:
Reported By: github.com
Extra Source Hub:
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