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Amazon Linux 2 : pcs (ALAS-2025-2853)

medium Nessus Plugin ID 235878

Synopsis

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

Description

The version of pcs installed on the remote host is prior to 0.9.169-3. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2853 advisory.

 Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied, it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. If used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.
 (CVE-2024-21510)

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

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

Solution

Run 'yum update pcs' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2025-2853.html

https://alas.aws.amazon.com/cve/html/CVE-2024-21510.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Medium

ID: 235878

File Name: al2_ALAS-2025-2853.nasl

Version: 1.1

Type: local

Agent: unix

Published: 5/13/2025

Updated: 5/13/2025

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2024-21510

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:pcs, p-cpe:/a:amazon:linux:pcs-snmp, p-cpe:/a:amazon:linux:pcs-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/13/2025

Vulnerability Publication Date: 11/1/2024

Reference Information

CVE: CVE-2024-21510