Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title NTP vulnerabilities
Informations
Name USN-3707-1 First vendor Publication 2018-07-09
Vendor Ubuntu Last vendor Modification 2018-07-09
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS - Ubuntu 17.10 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in NTP.

Software Description: - ntp: Network Time Protocol daemon and utility programs

Details:

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)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04 LTS:
ntp 1:4.2.8p10+dfsg-5ubuntu7.1

Ubuntu 17.10:
ntp 1:4.2.8p10+dfsg-5ubuntu3.3

Ubuntu 16.04 LTS:
ntp 1:4.2.8p4+dfsg-3ubuntu5.9

Ubuntu 14.04 LTS:
ntp 1:4.2.6.p5+dfsg-3ubuntu2.14.04.13

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3707-1
CVE-2018-7182, CVE-2018-7183, CVE-2018-7184, CVE-2018-7185

Package Information:
https://launchpad.net/ubuntu/+source/ntp/1:4.2.8p10+dfsg-5ubuntu7.1
https://launchpad.net/ubuntu/+source/ntp/1:4.2.8p10+dfsg-5ubuntu3.3
https://launchpad.net/ubuntu/+source/ntp/1:4.2.8p4+dfsg-3ubuntu5.9
https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p5+dfsg-3ubuntu2.14.04.13

Original Source

Url : http://www.ubuntu.com/usn/USN-3707-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 1
Application 1
Application 1
Application 1
Application 799
Application 86
Application 40
Application 2
Application 2
Hardware 1
Os 5
Os 3
Os 3
Os 3
Os 1

Snort® IPS/IDS

Date Description
2018-09-19 ntpq decode array buffer overflow attempt
RuleID : 47585 - Revision : 4 - Type : SERVER-OTHER
2018-05-22 Multiple Vendors NTP zero-origin timestamp denial of service attempt
RuleID : 46387 - Revision : 3 - Type : SERVER-OTHER

Nessus® Vulnerability Scanner

Date Description
2018-08-17 Name : The remote PhotonOS host is missing multiple security updates.
File : PhotonOS_PHSA-2018-1_0-0167.nasl - Type : ACT_GATHER_INFO
2018-05-29 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201805-12.nasl - Type : ACT_GATHER_INFO
2018-05-11 Name : The remote Amazon Linux 2 host is missing a security update.
File : al2_ALAS-2018-1009.nasl - Type : ACT_GATHER_INFO
2018-05-11 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2018-1009.nasl - Type : ACT_GATHER_INFO
2018-03-09 Name : The remote NTP server is affected by multiple vulnerabilities.
File : ntp_4_2_8p11.nasl - Type : ACT_GATHER_INFO
2018-03-02 Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2018-060-02.nasl - Type : ACT_GATHER_INFO
2018-02-28 Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_af485ef41c5811e88477d05099c0ae8c.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2019-01-24 17:21:23
  • Multiple Updates
2019-01-08 00:18:59
  • First insertion