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Amazon Linux 2 : rsync (ALAS-2022-1873)

high Nessus Plugin ID 167228

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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 ALAS2-2022-1873 advisory.

 - An issue was discovered in rsync before 3.2.5 that allows malicious remote servers to write arbitrary files inside the directories of connecting peers. The server chooses which files/directories are sent to the client. However, the rsync client performs insufficient validation of file names. A malicious rsync server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the rsync client target directory and subdirectories (for example, overwrite the .ssh/authorized_keys file). (CVE-2022-29154)

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' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2022-1873.html

https://alas.aws.amazon.com/cve/html/CVE-2022-29154.html

Plugin Details

Severity: High

ID: 167228

File Name: al2_ALAS-2022-1873.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/9/2022

Updated: 10/5/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.6

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

CVSS Score Source: CVE-2022-29154

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.7

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

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

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 Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/31/2022

Vulnerability Publication Date: 8/2/2022

Reference Information

CVE: CVE-2022-29154

IAVA: 2022-A-0304-S