RHEL 6 / 7 : ntp (RHSA-2017:0252)

High Nessus Plugin ID 97011

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for ntp is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The Network Time Protocol (NTP) is used to synchronize a computer's time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service.

Security Fix(es) :

* It was found that when ntp is configured with rate limiting for all associations the limits are also applied to responses received from its configured sources. A remote attacker who knows the sources can cause a denial of service by preventing ntpd from accepting valid responses from its sources. (CVE-2016-7426)

* A flaw was found in the control mode functionality of ntpd. A remote attacker could send a crafted control mode packet which could lead to information disclosure or result in DDoS amplification attacks.
(CVE-2016-9310)

* A flaw was found in the way ntpd implemented the trap service. A remote attacker could send a specially crafted packet to cause a NULL pointer dereference that will crash ntpd, resulting in a denial of service. (CVE-2016-9311)

* A flaw was found in the way ntpd running on a host with multiple network interfaces handled certain server responses. A remote attacker could use this flaw which would cause ntpd to not synchronize with the source. (CVE-2016-7429)

* A flaw was found in the way ntpd calculated the root delay. A remote attacker could send a specially crafted spoofed packet to cause denial of service or in some special cases even crash. (CVE-2016-7433)

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2017:0252

https://access.redhat.com/security/cve/cve-2016-7426

https://access.redhat.com/security/cve/cve-2016-7429

https://access.redhat.com/security/cve/cve-2016-7433

https://access.redhat.com/security/cve/cve-2016-9310

https://access.redhat.com/security/cve/cve-2016-9311

Plugin Details

Severity: High

ID: 97011

File Name: redhat-RHSA-2017-0252.nasl

Version: 3.14

Type: local

Agent: unix

Published: 2017/02/06

Updated: 2019/10/24

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.1

Temporal Score: 5.3

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:ntp, p-cpe:/a:redhat:enterprise_linux:ntp-debuginfo, p-cpe:/a:redhat:enterprise_linux:ntp-doc, p-cpe:/a:redhat:enterprise_linux:ntp-perl, p-cpe:/a:redhat:enterprise_linux:ntpdate, p-cpe:/a:redhat:enterprise_linux:sntp, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:7.3, cpe:/o:redhat:enterprise_linux:7.4, cpe:/o:redhat:enterprise_linux:7.5, cpe:/o:redhat:enterprise_linux:7.6, cpe:/o:redhat:enterprise_linux:7.7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2017/02/06

Vulnerability Publication Date: 2017/01/13

Reference Information

CVE: CVE-2016-7426, CVE-2016-7429, CVE-2016-7433, CVE-2016-9310, CVE-2016-9311

RHSA: 2017:0252