CVE-2021-3737

Updated: 2026-02-25 09:53:29.096791

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x HIGH 7.1
CVSS Version 3.x HIGH 7.5

Status

OS name Project name Version Score Severity Status Errata Last updated

Statement

Ubuntu 18.04 ELS python2.7 2.7.17-1 7.5 HIGH Released CLSA-2023:1689701064 2023-07-20 11:07:47
Ubuntu 18.04 ELS python3.6 3.6.9-1 7.5 HIGH Already Fixed 2023-06-02 09:09:48
Ubuntu 20.04 ELS php 7.4.3 7.5 HIGH Not Vulnerable 2025-09-30 05:27:23
Total: 33