Debian DLA-742-1 : chrony security update

high Nessus Plugin ID 95775

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Synopsis

The remote Debian host is missing a security update.

Description

It was discovered that Chrony, a versatile implementation of the Network Time Protocol, did not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a 'skeleton key.'

This update also resolves Debian bug #568492.

For Debian 7 'Wheezy', these problems have been fixed in version 1.24-3.1+deb7u4.

We recommend that you upgrade your chrony packages.

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 chrony package.

Plugin Details

Severity: High

ID: 95775

File Name: debian_DLA-742.nasl

Version: 3.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 12/14/2016

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:chrony, 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: 12/13/2016

Reference Information

CVE: CVE-2016-1567

Detections

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