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Amazon Linux 2 : python (ALAS-2020-1432)

medium Nessus Plugin ID 137089

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of python installed on the remote host is prior to 2.7.18-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1432 advisory.

 http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.(CVE-2018-20852)

 Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.(CVE-2020-8492)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update python' to update your system.

See Also

https://access.redhat.com/security/cve/CVE-2018-20852

https://access.redhat.com/security/cve/CVE-2020-8492

https://alas.aws.amazon.com/AL2/ALAS-2020-1432.html

Plugin Details

Severity: Medium

ID: 137089

File Name: al2_ALAS-2020-1432.nasl

Version: 1.4

Type: local

Agent: unix

Published: 6/4/2020

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2018-20852

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:python-tools, p-cpe:/a:amazon:linux:python-test, p-cpe:/a:amazon:linux:python-debuginfo, p-cpe:/a:amazon:linux:python-devel, p-cpe:/a:amazon:linux:python-debug, p-cpe:/a:amazon:linux:python-libs, p-cpe:/a:amazon:linux:python, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:tkinter

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/3/2020

Vulnerability Publication Date: 7/13/2019

Reference Information

CVE: CVE-2018-20852, CVE-2020-8492

ALAS: 2020-1432