RHEL 5 : ntp (RHSA-2009:1039)

Medium Nessus Plugin ID 38820


The remote Red Hat host is missing a security update.


An updated ntp package that fixes two security issues is now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

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

A buffer overflow flaw was discovered in the ntpd daemon's NTPv4 authentication code. If ntpd was configured to use public key cryptography for NTP packet authentication, a remote attacker could use this flaw to send a specially crafted request packet that could crash ntpd. (CVE-2009-1252)

Note: NTP authentication is not enabled by default.

A buffer overflow flaw was found in the ntpq diagnostic command. A malicious, remote server could send a specially crafted reply to an ntpq request that could crash ntpq. (CVE-2009-0159)

All ntp users are advised to upgrade to this updated package, which contains backported patches to resolve these issues. After installing the update, the ntpd daemon will be restarted automatically.


Update the affected ntp package.

See Also




Plugin Details

Severity: Medium

ID: 38820

File Name: redhat-RHSA-2009-1039.nasl

Version: $Revision: 1.20 $

Type: local

Agent: unix

Published: 2009/05/19

Modified: 2017/01/03

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.8

Temporal Score: 5

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:ntp, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:5.3

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: 2009/05/18

Reference Information

CVE: CVE-2009-0159, CVE-2009-1252

BID: 35017

OSVDB: 53593, 54576

RHSA: 2009:1039

CWE: 119