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Amazon Linux AMI : puppet3 (ALAS-2017-849)

high Nessus Plugin ID 101002

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Synopsis

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

Description

Unsafe YAML deserialization :

Versions of Puppet prior to 4.10.1 will deserialize data off the wire (from the agent to the server, in this case) with a attacker-specified format. This could be used to force YAML deserialization in an unsafe manner, which would lead to remote code execution. This change constrains the format of data on the wire to PSON or safely decoded YAML. (CVE-2017-2295 )

Solution

Run 'yum update puppet3' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2017-849.html

Plugin Details

Severity: High

ID: 101002

File Name: ala_ALAS-2017-849.nasl

Version: 3.5

Type: local

Agent: unix

Published: 6/23/2017

Updated: 12/15/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

CVSS Score Source: CVE-2017-2295

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:puppet3-server, p-cpe:/a:amazon:linux:puppet3

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/22/2017

Reference Information

CVE: CVE-2017-2295

ALAS: 2017-849