Amazon Linux 2 : squid (ALASSQUID4-2023-005)

high Nessus Plugin ID 181949


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


The version of squid installed on the remote host is prior to 4.14-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2SQUID4-2023-005 advisory.

- An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings. (CVE-2020-25097)

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


Run 'yum update squid' to update your system.

See Also

Plugin Details

Severity: High

ID: 181949

File Name: al2_ALASSQUID4-2023-005.nasl

Version: 1.0

Type: local

Agent: unix

Published: 9/27/2023

Updated: 9/27/2023

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

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-25097


Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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:amazon:linux:squid, p-cpe:/a:amazon:linux:squid-debuginfo, 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: 8/21/2023

Vulnerability Publication Date: 3/19/2021

Reference Information

CVE: CVE-2020-25097

IAVB: 2021-B-0021