Sanic is an opensource python web server/framework. In version 25.12.0, Sanic's core HTTP/1.1 chunked-body handling does not fully consume the trailer-part after the terminating zero chunk before reusing the keep-alive connection buffer. A remote unauthenticated client can place attacker-controlled bytes in that trailer region, causing Sanic to parse and route them as a hidden second request after the outer request.
This breaks HTTP request-boundary integrity and can provide a request-smuggling primitive when Sanic is deployed behind intermediaries. This issue is fixed in version 25.12.1.
Характеристики атаки
Способ атаки
По сети
Атака возможна удалённо
Сложность
Низкая
Легко эксплуатировать
Нужны права
Не требуются
Права не нужны
Участие пользователя
Не требуется
Не нужно действие пользователя
Последствия
Конфиденциальность
Нет
Нет утечки данных
Целостность
Низкое
Частичная модификация данных
Доступность
Низкое
Частичное нарушение работы
Строка CVSS v3.1
Тип уязвимости (CWE)
Ссылки 8
https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeaf…
security-advisories@github.com
https://github.com/sanic-org/sanic/commit/69a10d3b06babaa9e5f6d1af577364e9e53b6…
security-advisories@github.com
https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea…
security-advisories@github.com
https://github.com/sanic-org/sanic/pull/3164
security-advisories@github.com
https://github.com/sanic-org/sanic/pull/3165
security-advisories@github.com
https://github.com/sanic-org/sanic/releases/tag/v24.12.1
security-advisories@github.com
https://github.com/sanic-org/sanic/releases/tag/v25.12.1
security-advisories@github.com
https://github.com/sanic-org/sanic/security/advisories/GHSA-wmj6-g64g-j7q5
security-advisories@github.com