Linux Distros Unpatched Vulnerability : CVE-2021-3737

high Nessus Plugin ID 224042

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- 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. (CVE-2021-3737)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 224042

File Name: unpatched_CVE_2021_3737.nasl

Version: 1.4

Type: local

Agent: unix

Family: Misc.

Published: 3/5/2025

Updated: 9/10/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2021-3737

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:python2-devel, p-cpe:/a:centos:centos:python2-libs, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:python3-pygments, p-cpe:/a:redhat:enterprise_linux:python-test, p-cpe:/a:redhat:enterprise_linux:python-pymysql, p-cpe:/a:redhat:enterprise_linux:python2-tkinter, p-cpe:/a:centos:centos:python3-docutils, p-cpe:/a:centos:centos:python, p-cpe:/a:centos:centos:python3-bson, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:python-virtualenv, p-cpe:/a:redhat:enterprise_linux:python-devel, p-cpe:/a:redhat:enterprise_linux:tkinter, p-cpe:/a:centos:centos:python3-nose, p-cpe:/a:redhat:enterprise_linux:python3-sqlalchemy, p-cpe:/a:centos:centos:python36-devel, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:python-virtualenv-doc, p-cpe:/a:centos:centos:python3-pymongo-gridfs, p-cpe:/a:redhat:enterprise_linux:python2, p-cpe:/a:redhat:enterprise_linux:python-pymongo, p-cpe:/a:redhat:enterprise_linux:python2-tools, p-cpe:/a:centos:centos:python-tools, p-cpe:/a:centos:centos:python3-scipy, p-cpe:/a:centos:centos:python3-virtualenv, p-cpe:/a:debian:debian_linux:python2.7, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:python-wheel, p-cpe:/a:centos:centos:python-virtualenv-doc, p-cpe:/a:redhat:enterprise_linux:python3-virtualenv, p-cpe:/a:centos:centos:python-pygments, p-cpe:/a:centos:centos:python-debug, p-cpe:/a:centos:centos:tkinter, p-cpe:/a:centos:centos:python-sqlalchemy, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:python3-docutils, p-cpe:/a:redhat:enterprise_linux:python-virtualenv, p-cpe:/a:redhat:enterprise_linux:python2-devel, p-cpe:/a:centos:centos:python3-sqlalchemy, p-cpe:/a:redhat:enterprise_linux:python3-scipy, p-cpe:/a:redhat:enterprise_linux:python3-bson, p-cpe:/a:redhat:enterprise_linux:python-docutils, p-cpe:/a:centos:centos:python2-tkinter, p-cpe:/a:centos:centos:python3-docs, p-cpe:/a:centos:centos:python-pymysql, p-cpe:/a:redhat:enterprise_linux:python2-debug, p-cpe:/a:redhat:enterprise_linux:python-tools, p-cpe:/a:redhat:enterprise_linux:python-nose-docs, p-cpe:/a:redhat:enterprise_linux:scipy, p-cpe:/a:redhat:enterprise_linux:python-sqlalchemy, p-cpe:/a:centos:centos:python2, p-cpe:/a:redhat:enterprise_linux:python-pygments, p-cpe:/a:centos:centos:python3-pymysql, p-cpe:/a:redhat:enterprise_linux:python, p-cpe:/a:redhat:enterprise_linux:python-pymongo-doc, p-cpe:/a:redhat:enterprise_linux:python-debug, p-cpe:/a:redhat:enterprise_linux:python3-wheel, p-cpe:/a:redhat:enterprise_linux:python2-test, p-cpe:/a:centos:centos:scipy, p-cpe:/a:redhat:enterprise_linux:python3-wheel-wheel, p-cpe:/a:centos:centos:python-docutils, p-cpe:/a:centos:centos:python-sqlalchemy-doc, p-cpe:/a:centos:centos:python-nose, p-cpe:/a:centos:centos:python-distro, p-cpe:/a:centos:centos:python3-pygments, p-cpe:/a:centos:centos:python3-wheel-wheel, p-cpe:/a:centos:centos:python-test, p-cpe:/a:redhat:enterprise_linux:python3-distro, p-cpe:/a:centos:centos:python36-debug, p-cpe:/a:redhat:enterprise_linux:python2-libs, p-cpe:/a:centos:centos:python2-tools, p-cpe:/a:centos:centos:python3-wheel, p-cpe:/a:centos:centos:python36-rpm-macros, p-cpe:/a:redhat:enterprise_linux:python36-devel, p-cpe:/a:redhat:enterprise_linux:python36-debug, p-cpe:/a:centos:centos:python2-test, p-cpe:/a:redhat:enterprise_linux:python36-rpm-macros, p-cpe:/a:redhat:enterprise_linux:python-libs, p-cpe:/a:centos:centos:python3-distro, p-cpe:/a:centos:centos:python-nose-docs, p-cpe:/a:redhat:enterprise_linux:python3-pymongo-gridfs, p-cpe:/a:centos:centos:python-pymongo, p-cpe:/a:redhat:enterprise_linux:python-distro, p-cpe:/a:redhat:enterprise_linux:python3-nose, p-cpe:/a:redhat:enterprise_linux:python3-pymysql, p-cpe:/a:redhat:enterprise_linux:python-docs, p-cpe:/a:redhat:enterprise_linux:python-sqlalchemy-doc, p-cpe:/a:redhat:enterprise_linux:python3-docs, p-cpe:/a:centos:centos:python-devel, p-cpe:/a:centos:centos:python-docs, p-cpe:/a:centos:centos:python-pymongo-doc, p-cpe:/a:centos:centos:python2-debug, p-cpe:/a:redhat:enterprise_linux:python-nose, p-cpe:/a:centos:centos:python3-pymongo, p-cpe:/a:redhat:enterprise_linux:python-wheel, p-cpe:/a:centos:centos:python-libs, p-cpe:/a:redhat:enterprise_linux:python3-pymongo

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 9/20/2021

Reference Information

CVE: CVE-2021-3737

Detections

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