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Debian DLA-2201-1 : ntp security update

high Nessus Plugin ID 136366

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Synopsis

The remote Debian host is missing a security update.

Description

A Denial of Service (DoS) vulnerability was discovered in the network time protocol server/client, ntp.

ntp allowed an 'off-path' attacker to block unauthenticated synchronisation via a server mode packet with a spoofed source IP address because transmissions were rescheduled even if a packet lacked a valid 'origin timestamp'

For Debian 8 'Jessie', this issue has been fixed in ntp version 1:4.2.6.p5+dfsg-7+deb8u3.

We recommend that you upgrade your ntp 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 ntp, ntp-doc, and ntpdate packages.

See Also

https://lists.debian.org/debian-lts-announce/2020/05/msg00004.html

https://packages.debian.org/source/jessie/ntp

Plugin Details

Severity: High

ID: 136366

File Name: debian_DLA-2201.nasl

Version: 1.5

Type: local

Agent: unix

Published: 5/7/2020

Updated: 3/13/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-11868

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:ntpdate, cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:ntp-doc, p-cpe:/a:debian:debian_linux:ntp

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/5/2020

Vulnerability Publication Date: 4/17/2020

Reference Information

CVE: CVE-2020-11868