CVE-2023-37276

Advisory

Aiohttp 3.8.5 includes a fix for CVE-2023-37276: Sending a crafted HTTP request will cause the server to misinterpret one of the HTTP header values leading to HTTP request smuggling.
https://github.com/aio-libs/aiohttp/commit/9337fb3f2ab2b5f38d7e98a194bde6f7e3d16c40
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-45c4-8wx5-qw6w

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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. See CVE-2023-37276.


MISC:https://github.com/aio-libs/aiohttp/blob/v3.8.4/.gitmodules: https://github.com/aio-libs/aiohttp/blob/v3.8.4/.gitmodules
MISC:https://github.com/aio-libs/aiohttp/commit/9337fb3f2ab2b5f38d7e98a194bde6f7e3d16c40: https://github.com/aio-libs/aiohttp/commit/9337fb3f2ab2b5f38d7e98a194bde6f7e3d16c40
MISC:https://github.com/aio-libs/aiohttp/security/advisories/GHSA-45c4-8wx5-qw6w: https://github.com/aio-libs/aiohttp/security/advisories/GHSA-45c4-8wx5-qw6w
MISC:https://hackerone.com/reports/2001873: https://hackerone.com/reports/2001873

Resources

• https://github.com/aio-libs/aiohttp/blob/v3.8.4/.gitmodules
• https://github.com/aio-libs/aiohttp/commit/9337fb3f2ab2b5f38d7e98a194bde6f7e3d16c40
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-45c4-8wx5-qw6w
• https://hackerone.com/reports/2001873
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-37276