Amazon Linux 2 : rsync, --advisory ALAS2-2026-3332 (ALAS-2026-3332)

medium Nessus Plugin ID 319858

Synopsis

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

Description

The version of rsync installed on the remote host is prior to 3.1.2-11. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3332 advisory.

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds.
Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation. (CVE-2026-43618)

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 rsync' or or 'yum update --advisory ALAS2-2026-3332' to update your system.

Plugin Details

Severity: Medium

ID: 319858

File Name: al2_ALAS-2026-3332.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 6/8/2026

Updated: 6/8/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-43618

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.1

Threat Score: 2.4

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:rsync, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:rsync-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: 6/8/2026

Vulnerability Publication Date: 5/20/2026

Reference Information

CVE: CVE-2026-43618

IAVA: 2026-A-0502

Detections

Analytics