Debian DLA-2686-1 : python-urllib3 - LTS security update

critical Nessus Plugin ID 150806

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2686 advisory.

Several vulnerabilities were discovered in python-urllib3, a HTTP client for Python. CVE-2018-20060 Urllib3 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext. CVE-2019-11236 CRLF injection is possible if the attacker controls the request parameter. CVE-2019-11324 Urllib3 mishandles certain cases where the desired set of CA certificates is different from the OS store of CA certificates, which results in SSL connections succeeding in situations where a verification failure is the correct outcome. This is related to use of the ssl_context, ca_certs, or ca_certs_dir argument. CVE-2020-26137 Urllib3 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of putrequest(). For Debian 9 stretch, these problems have been fixed in version 1.19.1-1+deb9u1. We recommend that you upgrade your python-urllib3 packages. For the detailed security status of python-urllib3 please refer to its security tracker page at: https://security- tracker.debian.org/tracker/python-urllib3 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at:
https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the python-urllib3 packages.

For Debian 9 stretch, these problems have been fixed in version 1.19.1-1+deb9u1.

Plugin Details

Severity: Critical

ID: 150806

File Name: debian_DLA-2686.nasl

Version: 1.11

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 6/16/2021

Updated: 1/24/2025

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2020-26137

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS Score Source: CVE-2018-20060

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python-urllib3, p-cpe:/a:debian:debian_linux:python3-urllib3, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/15/2021

Vulnerability Publication Date: 12/11/2018

Reference Information

CVE: CVE-2018-20060, CVE-2019-11236, CVE-2019-11324, CVE-2020-26137

Detections

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