CVE-2024-41810

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.

Summary

The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body.

Details

Twisted’s redirectTo function generates an HTTP 302 Redirect response. The response contains an HTML body, built for exceptional cases where the browser doesn’t properly handle the redirect, allowing the user to click a link, navigating them to the specified destination.

The function reflects the destination URL in the HTML body without any output encoding.

# https://github.com/twisted/twisted/blob/trunk/src/twisted/web/_template_util.py#L88
def redirectTo(URL: bytes, request: IRequest) -> bytes:
    # ---snip---
    content = b"""
<html>
    <head>
        <meta http-equiv=\"refresh\" content=\"0;URL=%(url)s\">
    </head>
    <body bgcolor=\"#FFFFFF\" text=\"#000000\">
    <a href=\"%(url)s\">click here</a>
    </body>
</html>
""" % {
        b"url": URL
    }
    return content

If an attacker has full or partial control over redirect location due to an application bug, also known as an “Open Redirect”, they may inject arbitrary HTML into the response’s body, ultimately leading to an XSS attack.

It’s worth noting that the issue is known to maintainers and tracked with GitHub Issue#9839. The issue description, however, does not make any mention of exploitability and simply states: “…Browsers don't seem to actually render that page…”

PoC

The issue can be reproduced by running the following Twisted-based HTTP server locally:

from twisted.web import server, resource
from twisted.internet import reactor
from twisted.web.util import redirectTo

class Simple(resource.Resource):
    isLeaf = True
    def render_GET(self, request):
        url = request.args[b'url'][0]  # <-- open redirect
        return redirectTo(url, request)

site = server.Site(Simple())
reactor.listenTCP(9009, site)
reactor.run()

Once running, navigate to the following URL: http://127.0.0.1:9009?url=ws://example.com/"><script>alert(document.location)</script>, and verify that the “alert” dialog was displayed.

Note: Due to the different ways browsers validate the redirect Location header, this attack is possible only in Firefox. All other tested browsers will display an error message to the user and will not render the HTML body.

Impact

If successfully exploited, the issue will allow malicious JavaScript to run in the context of the victim's session. This will in turn lead to unauthorized access/modification to victim's account and information associated with it, or allow for unauthorized operations to be performed within the context of the victim's session.

Twisted is an event-based framework for internet applications, supporting Python 2.7 and Python 3.5+. It includes modules for many different purposes, including the following:

Security Fix(es):

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The HTTP 1.0 and 1.1 server provided by twisted.web could process pipelined HTTP requests out-of-order, possibly resulting in information disclosure. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41671)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41810)

Twisted is an event-based framework for internet applications, supporting Python 2.7 and Python 3.5+. It includes modules for many different purposes, including the following:

Security Fix(es):

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The HTTP 1.0 and 1.1 server provided by twisted.web could process pipelined HTTP requests out-of-order, possibly resulting in information disclosure. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41671)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41810)

Twisted is an event-based framework for internet applications, supporting Python 2.7 and Python 3.5+. It includes modules for many different purposes, including the following:

Security Fix(es):

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The HTTP 1.0 and 1.1 server provided by twisted.web could process pipelined HTTP requests out-of-order, possibly resulting in information disclosure. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41671)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41810)

Twisted is an event-based framework for internet applications, supporting Python 2.7 and Python 3.5+. It includes modules for many different purposes, including the following:

Security Fix(es):

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The HTTP 1.0 and 1.1 server provided by twisted.web could process pipelined HTTP requests out-of-order, possibly resulting in information disclosure. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41671)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41810)

Twisted is an event-based framework for internet applications, supporting Python 2.7 and Python 3.5+. It includes modules for many different purposes, including the following:

Security Fix(es):

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The HTTP 1.0 and 1.1 server provided by twisted.web could process pipelined HTTP requests out-of-order, possibly resulting in information disclosure. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41671)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.(CVE-2024-41810)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The twisted.web.util.redirectTo function contains an HTML injection vulnerability. If application code allows an attacker to control the redirect URL this vulnerability may result in Reflected Cross-Site Scripting (XSS) in the redirect response HTML body. This vulnerability is fixed in 24.7.0rc1.

TuxCare rebuilt twisted to address 4 CVEs. Fixed in 20.3.0.post4+tuxcare.

Twisted.web has disordered HTTP pipeline response. (CVE-2023-46137) Twisted.web has disordered HTTP pipeline response. (CVE-2024-41671) HTML injection in HTTP redirect body. (CVE-2024-41810)

These are all security issues fixed in the python-Twisted-doc-24.3.0-2.1 package on the GA media of openSUSE Tumbleweed.

This update for python-Twisted fixes the following issues:

• CVE-2024-41671: Fixed an information disclosure due to HTTP requests processed out-of-order (bsc#1228549)
• CVE-2024-41810: Fixed reflected XSS via HTML injection in redirect response (bsc#1228552)

This update for python-Twisted fixes the following issues:

• CVE-2024-41671: Fixed an information disclosure due to HTTP requests processed out-of-order (bsc#1228549)
• CVE-2024-41810: Fixed reflected XSS via HTML injection in redirect response (bsc#1228552)

This update for python3-Twisted fixes the following issues:

• CVE-2024-41671: Fixed HTTP pipelined requests processed out of order in twisted.web (bsc#1228549)
• CVE-2024-41810: Fixed reflected XSS via HTML Injection in Redirect Response (bsc#1228552)

This update for python-Twisted fixes the following issues:

• CVE-2024-41671: Fixed an information disclosure due to HTTP requests processed out-of-order (bsc#1228549)
• CVE-2024-41810: Fixed reflected XSS via HTML injection in redirect response (bsc#1228552)

Ben Kallus discovered that Twisted incorrectly handled response order when processing multiple HTTP requests. A remote attacker could possibly use this issue to delay and manipulate responses. This issue only affected Ubuntu 24.04 LTS. (CVE-2024-41671)

It was discovered that Twisted did not properly sanitize certain input. An attacker could use this vulnerability to possibly execute an HTML injection leading to a cross-site scripting (XSS) attack. (CVE-2024-41810)