Amazon Linux 2023 : cups, cups-client, cups-devel (ALAS2023-2026-1668)

medium Nessus Plugin ID 315651

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1668 advisory.

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case- insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches.
(CVE-2026-27447)

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This vulnerability is fixed in 2.4.17. (CVE-2026-41079)

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 'dnf update cups --releasever 2023.11.20260511' or or 'dnf update --advisory ALAS2023-2026-1668 --releasever 2023.11.20260511' to update your system.

Plugin Details

Severity: Medium

ID: 315651

File Name: al2023_ALAS2023-2026-1668.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 5/20/2026

Updated: 5/20/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2026-27447

CVSS v3

Risk Factor: Medium

Base Score: 6.3

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:cups, p-cpe:/a:amazon:linux:cups-debuginfo, p-cpe:/a:amazon:linux:cups-devel, p-cpe:/a:amazon:linux:cups-libs, p-cpe:/a:amazon:linux:cups-lpd, p-cpe:/a:amazon:linux:cups-client, p-cpe:/a:amazon:linux:cups-filesystem, p-cpe:/a:amazon:linux:cups-ipptool, p-cpe:/a:amazon:linux:cups-client-debuginfo, p-cpe:/a:amazon:linux:cups-debugsource, p-cpe:/a:amazon:linux:cups-ipptool-debuginfo, p-cpe:/a:amazon:linux:cups-libs-debuginfo, p-cpe:/a:amazon:linux:cups-lpd-debuginfo, p-cpe:/a:amazon:linux:cups-printerapp, p-cpe:/a:amazon:linux:cups-printerapp-debuginfo, cpe:/o:amazon:linux:2023

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: 5/14/2026

Vulnerability Publication Date: 4/3/2026

Reference Information

CVE: CVE-2026-27447, CVE-2026-41079

Detections

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