aiohttp up to 3.8.4 HTTP Request request smuggling

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in aiohttp up to 3.8.4. It has been declared as problematic. This impacts an unknown function of the component HTTP Request Handler. Executing a manipulation can lead to request smuggling. The identification of this vulnerability is CVE-2023-37276. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in aiohttp up to 3.8.4. It has been declared as problematic. This vulnerability affects some unknown processing of the component HTTP Request Handler. The manipulation with an unknown input leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. As an impact it is known to affect integrity. CVE summarizes:

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.

The weakness was shared 07/20/2023 as GHSA-45c4-8wx5-qw6w. The advisory is shared for download at github.com. This vulnerability was named CVE-2023-37276 since 06/29/2023. There are neither technical details nor an exploit publicly available.

Upgrading to version 3.8.5 eliminates this vulnerability. Applying the patch 9337fb3f2ab2b5f38d7e98a194bde6f7e3d16c40 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2024-0949). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Fedora Linux
  • Red Hat Enterprise Linux
  • Red Hat Satellite
  • IBM MQ

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Request smuggling
CWE: CWE-444
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: aiohttp 3.8.5
Patch: 9337fb3f2ab2b5f38d7e98a194bde6f7e3d16c40

Timelineinfo

06/29/2023 🔍
07/20/2023 +21 days 🔍
07/20/2023 +0 days 🔍
07/27/2025 +738 days 🔍

Sourcesinfo

Advisory: GHSA-45c4-8wx5-qw6w
Status: Confirmed

CVE: CVE-2023-37276 (🔍)
GCVE (CVE): GCVE-0-2023-37276
GCVE (VulDB): GCVE-100-235024
CERT Bund: WID-SEC-2024-0949 - Red Hat Satellite: Mehrere Schwachstellen

Entryinfo

Created: 07/20/2023 08:45
Updated: 07/27/2025 07:15
Changes: 07/20/2023 08:45 (51), 08/15/2023 08:18 (11), 07/27/2025 07:15 (22)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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