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Linux Distros Unpatched Vulnerability : CVE-2021-28861

high Nessus Plugin ID 223763

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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.

 - Python 3.x through 3.10 has an open redirection vulnerability in lib/http/server.py due to no protection against multiple (/) at the beginning of URI path which may leads to information disclosure. NOTE: this is disputed by a third party because the http.server.html documentation page states Warning: http.server is not recommended for production. It only implements basic security checks. (CVE-2021-28861)

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

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2021-28861

https://security-tracker.debian.org/tracker/CVE-2021-28861

Plugin Details

Severity: High

ID: 223763

File Name: unpatched_CVE_2021_28861.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 3/4/2025

Updated: 8/20/2025

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: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2021-28861

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:python-jinja2, p-cpe:/a:redhat:enterprise_linux:python38-pip, p-cpe:/a:redhat:enterprise_linux:python38-psutil, p-cpe:/a:centos:centos:python38-numpy-doc, p-cpe:/a:redhat:enterprise_linux:python3x-pip, p-cpe:/a:centos:centos:python-six, p-cpe:/a:redhat:enterprise_linux:python38-debug, p-cpe:/a:redhat:enterprise_linux:python38-markupsafe, p-cpe:/a:redhat:enterprise_linux:python-psutil, p-cpe:/a:redhat:enterprise_linux:python38-psycopg2-tests, p-cpe:/a:centos:centos:python-pysocks, p-cpe:/a:centos:centos:python38-numpy, p-cpe:/a:redhat:enterprise_linux:python3x-setuptools, p-cpe:/a:centos:centos:python38-pytz, p-cpe:/a:redhat:enterprise_linux:python-ply, p-cpe:/a:redhat:enterprise_linux:python38-psycopg2, p-cpe:/a:redhat:enterprise_linux:python38-setuptools, p-cpe:/a:centos:centos:python-cryptography, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:python38-test, p-cpe:/a:centos:centos:python-jinja2, p-cpe:/a:redhat:enterprise_linux:python38-lxml, p-cpe:/a:redhat:enterprise_linux:python-lxml, p-cpe:/a:centos:centos:numpy, p-cpe:/a:redhat:enterprise_linux:python38-numpy-f2py, p-cpe:/a:redhat:enterprise_linux:python38-idle, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:python-requests, p-cpe:/a:redhat:enterprise_linux:babel, p-cpe:/a:centos:centos:python-psutil, p-cpe:/a:centos:centos:python38-pysocks, p-cpe:/a:centos:centos:python-pycparser, p-cpe:/a:redhat:enterprise_linux:python38-six, p-cpe:/a:redhat:enterprise_linux:python38-asn1crypto, p-cpe:/a:redhat:enterprise_linux:python38-pyyaml, p-cpe:/a:redhat:enterprise_linux:pyyaml, p-cpe:/a:centos:centos:python38-rpm-macros, p-cpe:/a:redhat:enterprise_linux:python38-requests, p-cpe:/a:centos:centos:python38-wheel-wheel, p-cpe:/a:centos:centos:python38-asn1crypto, p-cpe:/a:centos:centos:python-lxml, p-cpe:/a:redhat:enterprise_linux:python38-numpy-doc, p-cpe:/a:redhat:enterprise_linux:python-urllib3, p-cpe:/a:centos:centos:python-ply, p-cpe:/a:debian:debian_linux:python2.7, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:python38-pysocks, p-cpe:/a:redhat:enterprise_linux:python38-jinja2, p-cpe:/a:centos:centos:python-asn1crypto, p-cpe:/a:redhat:enterprise_linux:python-cffi, p-cpe:/a:centos:centos:python38-idle, p-cpe:/a:redhat:enterprise_linux:python38-scipy, p-cpe:/a:redhat:enterprise_linux:python-idna, p-cpe:/a:redhat:enterprise_linux:python38-wheel, p-cpe:/a:centos:centos:python38-libs, p-cpe:/a:redhat:enterprise_linux:python38-chardet, p-cpe:/a:redhat:enterprise_linux:python38-cffi, p-cpe:/a:redhat:enterprise_linux:python38-tkinter, p-cpe:/a:redhat:enterprise_linux:python38-babel, p-cpe:/a:centos:centos:python38-ply, p-cpe:/a:centos:centos:python38-babel, p-cpe:/a:redhat:enterprise_linux:python38-mod_wsgi, p-cpe:/a:centos:centos:python38-debug, p-cpe:/a:centos:centos:pyyaml, p-cpe:/a:centos:centos:python38-tkinter, p-cpe:/a:redhat:enterprise_linux:python-markupsafe, p-cpe:/a:redhat:enterprise_linux:python-asn1crypto, p-cpe:/a:redhat:enterprise_linux:python38-pip-wheel, p-cpe:/a:redhat:enterprise_linux:python38-psycopg2-doc, p-cpe:/a:centos:centos:python38-psutil, p-cpe:/a:redhat:enterprise_linux:python38-setuptools-wheel, p-cpe:/a:centos:centos:python38-setuptools-wheel, p-cpe:/a:redhat:enterprise_linux:python38-pytz, p-cpe:/a:centos:centos:python-requests, p-cpe:/a:redhat:enterprise_linux:python38-rpm-macros, p-cpe:/a:centos:centos:python3x-setuptools, p-cpe:/a:centos:centos:python38-cffi, p-cpe:/a:centos:centos:python38-requests, p-cpe:/a:centos:centos:python38-psycopg2-tests, p-cpe:/a:centos:centos:python38-mod_wsgi, p-cpe:/a:centos:centos:python38-cython, p-cpe:/a:centos:centos:python38-lxml, p-cpe:/a:centos:centos:babel, p-cpe:/a:redhat:enterprise_linux:python38-numpy, p-cpe:/a:centos:centos:python-chardet, p-cpe:/a:centos:centos:python38-cryptography, p-cpe:/a:redhat:enterprise_linux:numpy, p-cpe:/a:centos:centos:python-cffi, p-cpe:/a:redhat:enterprise_linux:python-six, p-cpe:/a:redhat:enterprise_linux:cython, p-cpe:/a:centos:centos:cython, p-cpe:/a:centos:centos:python38-numpy-f2py, p-cpe:/a:centos:centos:pytz, p-cpe:/a:centos:centos:python38-idna, p-cpe:/a:centos:centos:python38-jinja2, p-cpe:/a:centos:centos:python3x-pip, p-cpe:/a:centos:centos:python38-scipy, p-cpe:/a:redhat:enterprise_linux:python-cryptography, p-cpe:/a:centos:centos:python38, p-cpe:/a:redhat:enterprise_linux:pytz, p-cpe:/a:centos:centos:python-urllib3, p-cpe:/a:redhat:enterprise_linux:python38-ply, p-cpe:/a:centos:centos:python38-markupsafe, p-cpe:/a:centos:centos:python38-wheel, p-cpe:/a:centos:centos:python38-pip, p-cpe:/a:redhat:enterprise_linux:python38-pycparser, p-cpe:/a:redhat:enterprise_linux:python-pysocks, p-cpe:/a:redhat:enterprise_linux:python38-devel, p-cpe:/a:redhat:enterprise_linux:python38-libs, p-cpe:/a:centos:centos:python38-psycopg2-doc, p-cpe:/a:centos:centos:mod_wsgi, p-cpe:/a:centos:centos:python38-urllib3, p-cpe:/a:centos:centos:python-psycopg2, p-cpe:/a:redhat:enterprise_linux:python38-wheel-wheel, p-cpe:/a:redhat:enterprise_linux:python38-pymysql, p-cpe:/a:centos:centos:python38-pip-wheel, p-cpe:/a:centos:centos:python38-devel, p-cpe:/a:redhat:enterprise_linux:python38-idna, p-cpe:/a:centos:centos:python-markupsafe, p-cpe:/a:centos:centos:python3x-six, p-cpe:/a:centos:centos:python38-psycopg2, p-cpe:/a:redhat:enterprise_linux:python-pycparser, p-cpe:/a:redhat:enterprise_linux:python38-cython, p-cpe:/a:redhat:enterprise_linux:python38-cryptography, p-cpe:/a:centos:centos:python38-pycparser, p-cpe:/a:centos:centos:python38-pyyaml, p-cpe:/a:centos:centos:python38-setuptools, p-cpe:/a:redhat:enterprise_linux:python38-test, p-cpe:/a:redhat:enterprise_linux:python-chardet, p-cpe:/a:centos:centos:python38-six, p-cpe:/a:centos:centos:python38-chardet, p-cpe:/a:centos:centos:python38-pymysql, p-cpe:/a:redhat:enterprise_linux:python38-urllib3, p-cpe:/a:centos:centos:python-idna, p-cpe:/a:redhat:enterprise_linux:mod_wsgi, p-cpe:/a:redhat:enterprise_linux:python-psycopg2, p-cpe:/a:redhat:enterprise_linux:python38, p-cpe:/a:redhat:enterprise_linux:python3x-six

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 8/23/2022

Reference Information

CVE: CVE-2021-28861