02 Cpython 3104 Exploit: Wsgiserver

Never use the pickle module to decode data from untrusted sources.

The WSGI server interprets the request differently than a frontend proxy, allowing the attacker to "smuggle" a second request inside the first one. This can lead to unauthorized access or cache poisoning. Remote Code Execution (RCE) via Unsafe Deserialization

An attacker sends a malformed HTTP request containing both headers. wsgiserver 02 cpython 3104 exploit

A specific release of the standard Python interpreter. This version contains known vulnerabilities related to handling environment variables and parsing specific string types. ⚠️ Core Vulnerabilities and Attack Vectors

The most effective defense is to eliminate the vulnerable components entirely: Never use the pickle module to decode data

If the WSGI application parses cookies unsafely using an older Python 3.10.4 library, an attacker extracts system files using a serialized object:

The combination of WSGIServer 02 and CPython 3.10.4 introduces distinct attack surfaces. The most common exploitation vectors include: HTTP Request Smuggling Remote Code Execution (RCE) via Unsafe Deserialization An

An attacker reads sensitive local files, such as /etc/passwd or application configuration files containing database passwords. 💻 Proof of Concept (PoC) Scenarios

import pickle import os class Exploit(object): def __reduce__(self): # Executes a reverse shell or reads system files return (os.system, ('cat /etc/passwd > /tmp/compromised.txt',)) # The resulting string is sent as a session cookie to the WSGIServer print(pickle.dumps(Exploit())) Use code with caution. 🛡️ Remediation and Defensive Measures