Debian DLA-1012-1 : puppet security update

high Nessus Plugin ID 101211

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Synopsis

The remote Debian host is missing a security update.

Description

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.

For Debian 7 'Wheezy', these problems have been fixed in version 2.7.23-1~deb7u4, by enabling PSON serialization on clients and refusing non-PSON formats on the server.

We recommend that you upgrade your puppet packages. Make sure you update all your clients before you update the server otherwise older clients won't be able to connect to the server.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

Plugin Details

Severity: High

ID: 101211

File Name: debian_DLA-1012.nasl

Version: 3.8

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 7/5/2017

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless 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 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: p-cpe:/a:debian:debian_linux:puppet, p-cpe:/a:debian:debian_linux:puppet-common, p-cpe:/a:debian:debian_linux:puppet-el, p-cpe:/a:debian:debian_linux:puppet-testsuite, p-cpe:/a:debian:debian_linux:puppetmaster, p-cpe:/a:debian:debian_linux:puppetmaster-common, p-cpe:/a:debian:debian_linux:puppetmaster-passenger, p-cpe:/a:debian:debian_linux:vim-puppet, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/3/2017

Reference Information

CVE: CVE-2017-2295

Detections

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