Amazon Linux 2023 : perl-Net-CIDR-Lite (ALAS2023-2026-1732)

medium Nessus Plugin ID 316830

Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1732 advisory.

Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass.

Inputs containing a trailing newline or non-ASCII digit characters pass the validators but are then re- encoded by the parser to a different address than the input string spelled. find() and bin_find() can match or miss addresses as a result.

Example:

my $cidr = Net::CIDR::Lite->new();$cidr->add(::1\n/128);$cidr->find(::1a); # incorrectly returns true

See also CVE-2026-45191. (CVE-2026-45190)

Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass.

Mask forms like /00 and /01 pass validation and parse to the same prefix as their unpadded value.

See also CVE-2026-45190. (CVE-2026-45191)

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.

Plugin Details

Severity: Medium

ID: 316830

File Name: al2023_ALAS2023-2026-1732.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 5/26/2026

Updated: 5/26/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.3

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-45191

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:perl-net-cidr-lite

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/25/2026

Vulnerability Publication Date: 5/10/2026

Reference Information

CVE: CVE-2026-45190, CVE-2026-45191

Detections

Analytics