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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : NTP vulnerabilities (USN-3707-1)

critical Nessus Plugin ID 110974

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

Yihan Lian discovered that NTP incorrectly handled certain malformed mode 6 packets. A remote attacker could possibly use this issue to cause ntpd to crash, resulting in a denial of service. This issue only affected Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2018-7182)

Michael Macnair discovered that NTP incorrectly handled certain responses. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2018-7183)

Miroslav Lichvar discovered that NTP incorrectly handled certain zero-origin timestamps. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2018-7184)

Miroslav Lichvar discovered that NTP incorrectly handled certain zero-origin timestamps. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2018-7185).

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

Solution

Update the affected ntp, ntpdate and / or sntp packages.

See Also

https://ubuntu.com/security/notices/USN-3707-1

Plugin Details

Severity: Critical

ID: 110974

File Name: ubuntu_USN-3707-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 7/10/2018

Updated: 10/21/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

CVSS Score Source: CVE-2018-7183

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:ntp, p-cpe:/a:canonical:ubuntu_linux:ntpdate, p-cpe:/a:canonical:ubuntu_linux:sntp, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/9/2018

Vulnerability Publication Date: 3/6/2018

Reference Information

CVE: CVE-2018-7182, CVE-2018-7183, CVE-2018-7184, CVE-2018-7185

USN: 3707-1