CVE-2023-37276

Medium

not-fixedNot Available

Security vulnerability in aiohttp

Description

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.

Impact Assessment

This medium-severity vulnerability could be exploited under certain conditions to compromise security controls or access sensitive information. Should be addressed in a timely manner.

Attack Characteristics

Attack Vector

NETWORK

Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

CVSS v3.1 Score

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

1.34%

Probability of exploitation in the next 30 days · more likely than 70.4% of all CVEs.

Quick Facts

PublishedJan 1, 1

Last ModifiedJan 1, 1

Discovered ByIndependent Security Researcher

Statusnot-fixed

Weakness Types

CWE-444

Unknown CWE

This vulnerability is associated with CWE-444. This type of weakness can lead to security issues if not properly addressed.

Attack Metrics

CVSS v3.1 Metrics Breakdown

attack Vector

NETWORK

attack Complexity

LOW

privileges Required

NONE

user Interaction

NONE

scope

Unchanged

confidentiality Impact

Medium

integrity Impact

Medium

availability Impact

Medium

Remediation Guide

How to Fix This Vulnerability

Remediation Steps

1Review and audit affected systems for potential exploitation
2Implement additional security controls if immediate patching is not possible
3Monitor for suspicious activity related to this vulnerability

Mitigation Strategies

Network Segmentation

Medium

Isolate affected systems from untrusted networks until patching is complete

Monitoring and Detection

Medium

Implement enhanced monitoring for exploitation attempts and unusual behavior

Event History

Vulnerability Timeline

Vulnerability published

0001-01-01T00:00:00Z

published

▪ Common questions

How severe is CVE-2023-37276?

CVE-2023-37276 is rated MEDIUM with a CVSS score of 5.3 (attack vector: NETWORK).

What kind of weakness is CVE-2023-37276?

CVE-2023-37276 is classified as CWE-444 — Security vulnerability in aiohttp.

Back to All Vulnerabilities

CVE-2023-37276

Medium

not-fixedNot Available

Security vulnerability in aiohttp

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Description

Impact Assessment

This medium-severity vulnerability could be exploited under certain conditions to compromise security controls or access sensitive information. Should be addressed in a timely manner.

Attack Characteristics

Attack Vector

NETWORK

Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

CVSS v3.1 Score

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

1.34%

Probability of exploitation in the next 30 days · more likely than 70.4% of all CVEs.

Quick Facts

PublishedJan 1, 1

Last ModifiedJan 1, 1

Discovered ByIndependent Security Researcher

Statusnot-fixed

Weakness Types

CWE-444

Unknown CWE

This vulnerability is associated with CWE-444. This type of weakness can lead to security issues if not properly addressed.

Attack Metrics

CVSS v3.1 Metrics Breakdown

attack Vector

NETWORK

attack Complexity

LOW

privileges Required

NONE

user Interaction

NONE

scope

Unchanged

confidentiality Impact

Medium

integrity Impact

Medium

availability Impact

Medium

Remediation Guide

How to Fix This Vulnerability

Remediation Steps

1Review and audit affected systems for potential exploitation
2Implement additional security controls if immediate patching is not possible
3Monitor for suspicious activity related to this vulnerability

Mitigation Strategies

Network Segmentation

Medium

Isolate affected systems from untrusted networks until patching is complete

Monitoring and Detection

Medium

Implement enhanced monitoring for exploitation attempts and unusual behavior

Event History

Vulnerability Timeline

Vulnerability published

0001-01-01T00:00:00Z

published

▪ Common questions

How severe is CVE-2023-37276?

CVE-2023-37276 is rated MEDIUM with a CVSS score of 5.3 (attack vector: NETWORK).

What kind of weakness is CVE-2023-37276?

CVE-2023-37276 is classified as CWE-444 — Security vulnerability in aiohttp.

Back to All Vulnerabilities