RHEL 4 / 5 : ntp (RHSA-2009:1648)

high Nessus Plugin ID 43080

Synopsis

The remote Red Hat host is missing a security update for ntp.

Description

The remote Redhat Enterprise Linux 4 / 5 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2009:1648 advisory.

The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source.

Robin Park and Dmitri Vinokurov discovered a flaw in the way ntpd handled certain malformed NTP packets. ntpd logged information about all such packets and replied with an NTP packet that was treated as malformed when received by another ntpd. A remote attacker could use this flaw to create an NTP packet reply loop between two ntpd servers via a malformed packet with a spoofed source IP address and port, causing ntpd on those servers to use excessive amounts of CPU time and fill disk space with log messages.
(CVE-2009-3563)

All ntp users are advised to upgrade to this updated package, which contains a backported patch to resolve this issue. After installing the update, the ntpd daemon will restart automatically.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL ntp package based on the guidance in RHSA-2009:1648.

Plugin Details

Severity: High

ID: 43080

File Name: redhat-RHSA-2009-1648.nasl

Version: 1.26

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 12/9/2009

Updated: 11/4/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2009-3563

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:redhat:enterprise_linux:ntp, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:4

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/8/2009

Vulnerability Publication Date: 12/9/2009

Reference Information

CVE: CVE-2009-3563

RHSA: 2009:1648

Detections

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