Amazon Linux AMI : python27 (ALAS-2023-1713)

high Nessus Plugin ID 173938

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Synopsis

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

Description

The version of python27 installed on the remote host is prior to 2.7.18-2.145. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2023-1713 advisory.

- An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname.
For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16. (CVE-2022-45061)

- An issue in the urllib.parse component of Python before v3.11 allows attackers to bypass blocklisting methods by supplying a URL that starts with blank characters. (CVE-2023-24329)

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 python27' to update your system.

Plugin Details

Severity: High

ID: 173938

File Name: ala_ALAS-2023-1713.nasl

Version: 1.5

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 4/6/2023

Updated: 9/15/2023

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: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2023-24329

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:H/A:N

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:python27-libs, p-cpe:/a:amazon:linux:python27-devel, p-cpe:/a:amazon:linux:python27-test, p-cpe:/a:amazon:linux:python27, p-cpe:/a:amazon:linux:python27-debuginfo, p-cpe:/a:amazon:linux:python27-tools, cpe:/o:amazon:linux

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: 3/30/2023

Vulnerability Publication Date: 11/8/2022

Reference Information

CVE: CVE-2022-45061, CVE-2023-24329

IAVA: 2022-A-0467-S, 2023-A-0061-S, 2023-A-0118-S, 2023-A-0283-S

Detections

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