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

Medium Nessus Plugin ID 137089

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VPR Score: 3.6

Synopsis

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

Description

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)

Solution

Run 'yum update python' to update your system.

See Also

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

Plugin Details

Severity: Medium

ID: 137089

File Name: al2_ALAS-2020-1432.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2020/06/04

Updated: 2020/06/09

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2018-20852

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 5.3

Temporal Score: 4.6

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:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/06/03

Vulnerability Publication Date: 2019/07/13

Reference Information

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

ALAS: 2020-1432