CVE-2024-23829

• CVSS 6.5
• CWE-444
• Input Validation and Sanitization
• Remote

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets, that must trigger error handling to robustly match frame boundaries of proxies in order to protect against injection of additional requests. Additionally, validation could trigger exceptions that were not handled consistently with processing of other malformed input. Being more lenient than internet standards require could, depending on deployment environment, assist in request smuggling. The unhandled exception could cause excessive resource consumption on the application server and/or its logging facilities. This vulnerability exists due to an incomplete fix for CVE-2023-47627. Version 3.9.2 fixes this vulnerability.

CVE

CVE-2024-23829

CWE

CWE-444

CVSS base score

6.5

Published

2024-01-29

OWASP

A05 Security Misconfiguration

Orthogonal defect classification

Checking

Category

Input Validation and Sanitization

Subcategory

Inadequate Error Handling

Accessibility scope

Remote

Impact

Denial of Service (DoS)

Affected component

aiohttp

Fixed by upgrading

Yes

Solution

Upgrade to aiohttp version 3.9.2 or later.

import aiohttp
import asyncio

async def handle_request(request):
    data = await request.text()
    return aiohttp.web.Response(text="Request processed successfully")

app = aiohttp.web.Application()
app.router.add_post('/endpoint', handle_request)

if __name__ == '__main__':
    aiohttp.web.run_app(app)

import aiohttp
from aiohttp import web
import asyncio
import bleach

async def handle_request(request):
    data = await request.text()
    escaped_data = bleach.clean(data)

    return web.Response(text="Request processed successfully")

app = web.Application()
app.router.add_post('/endpoint', handle_request)

if __name__ == '__main__':
    web.run_app(app)

POST /endpoint HTTP/1.1
Host: vulnerable.server
Content-Length: 50

malicious_payload_here

@misc{vaitp:cve202423829,
  title        = {{}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2024},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2024-23829},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2024-23829/}}
}