GHSA-45c4-8wx5-qw6w

Опубликовано: 20 июл. 2023

Источник: github

Github: Прошло ревью

CVSS4: 6.9

CVSS3: 5.3

Описание

aiohttp.web.Application vulnerable to HTTP request smuggling via llhttp HTTP request parser

Impact

aiohttp v3.8.4 and earlier are bundled with llhttp v6.0.6 which is vulnerable to CVE-2023-30589. The vulnerable code is used by aiohttp for its HTTP request parser when available which is the default case when installing from a wheel.

This vulnerability only affects users of aiohttp as an HTTP server (ie aiohttp.Application), you are not affected by this vulnerability if you are using aiohttp as an HTTP client library (ie aiohttp.ClientSession).

Reproducer

from aiohttp import web async def example(request: web.Request): headers = dict(request.headers) body = await request.content.read() return web.Response(text=f"headers: {headers} body: {body}") app = web.Application() app.add_routes([web.post('/', example)]) web.run_app(app)

Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling.

$ printf "POST / HTTP/1.1\r\nHost: localhost:8080\r\nX-Abc: \rxTransfer-Encoding: chunked\r\n\r\n1\r\nA\r\n0\r\n\r\n" \ | nc localhost 8080 Expected output: headers: {'Host': 'localhost:8080', 'X-Abc': '\rxTransfer-Encoding: chunked'} body: b'' Actual output (note that 'Transfer-Encoding: chunked' is an HTTP header now and body is treated differently) headers: {'Host': 'localhost:8080', 'X-Abc': '', 'Transfer-Encoding': 'chunked'} body: b'A'

Patches

Upgrade to the latest version of aiohttp to resolve this vulnerability. It has been fixed in v3.8.5: pip install aiohttp >= 3.8.5

Workarounds

If you aren't able to upgrade you can reinstall aiohttp using AIOHTTP_NO_EXTENSIONS=1 as an environment variable to disable the llhttp HTTP request parser implementation. The pure Python implementation isn't vulnerable to request smuggling:

$ python -m pip uninstall --yes aiohttp $ AIOHTTP_NO_EXTENSIONS=1 python -m pip install --no-binary=aiohttp --no-cache aiohttp

References

Ссылки

Пакеты

Наименование

aiohttp

pip

Затронутые версииВерсия исправления

<= 3.8.4

3.8.5

EPSS

Процентиль: 90%

0.05842

Низкий

6.9 Medium

CVSS4

5.3 Medium

CVSS3

CVE ID

CVE-2023-37276

Дефекты

CWE-444

Связанные уязвимости

CVE-2023-37276

CVSS3: 5.3

ubuntu

почти 2 года назад

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. aiohttp v3.8.4 and earlier are bundled with llhttp v6.0.6. Vulnerable code is used by aiohttp for its HTTP request parser when available which is the default case when installing from a wheel. This vulnerability only affects users of aiohttp as an HTTP server (ie `aiohttp.Application`), you are not affected by this vulnerability if you are using aiohttp as an HTTP client library (ie `aiohttp.ClientSession`). Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling. This issue has been addressed in version 3.8.5. Users are advised to upgrade. Users unable to upgrade can reinstall aiohttp using `AIOHTTP_NO_EXTENSIONS=1` as an environment variable to disable the llhttp HTTP request parser implementation. The pure Python implementation isn't vulnerable.

CVE-2023-37276

CVSS3: 7.5

redhat

почти 2 года назад

CVE-2023-37276

CVSS3: 5.3

nvd

почти 2 года назад

CVE-2023-37276

CVSS3: 5.3

debian

почти 2 года назад

aiohttp is an asynchronous HTTP client/server framework for asyncio an ...

BDU:2023-05462

CVSS3: 7.5

fstec

почти 2 года назад

Уязвимость HTTP-клиента aiohttp, связанная с недостатками обработки HTTP-запросов, позволяющая нарушителю отправить скрытый HTTP-запрос (атака типа HTTP Request Smuggling)

EPSS

Процентиль: 90%

0.05842

Низкий

6.9 Medium

CVSS4

5.3 Medium

CVSS3

CVE ID

CVE-2023-37276

Дефекты

CWE-444