Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-3737

7.5 · HIGH

A flaw was found in python.

Published Mar 4, 2022CWE-835EPSS 13.17%

Overview

CVE-2021-3737 is a high-severity vulnerability. It was published on March 4, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugs.python.org/issue44022Refbugzilla.redhat.com/show_bug.cgi?id=1995162GitHubgithub.com/python/cpython/pull/25916GitHubgithub.com/python/cpython/pull/26503Reflists.debian.org/debian-lts-announce/2023/05/msg00024.htmlReflists.debian.org/debian-lts-announce/2023/06/msg00039.htmlRefpython-security.readthedocs.io/vuln/urllib-100-continue-loop.htmlRefsecurity.netapp.com/advisory/ntap-20220407-0009/Refubuntu.com/security/CVE-2021-3737Refwww.oracle.com/security-alerts/cpujul2022.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-3737?

CVE-2021-3737 is a high-severity vulnerability. It was published on March 4, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-3737?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-3737?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-3737?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-3737 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999