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.

====================================================================                   Red Hat Security Advisory

Synopsis:          Important: ntp security update
Advisory ID:       RHSA-2009:1039-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2009:1039.html
Issue date:        2009-05-18
CVE Names:         CVE-2009-0159 CVE-2009-1252 
====================================================================
1. Summary:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

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.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at

5. Bugs fixed (http://bugzilla.redhat.com/):

490617 - CVE-2009-0159 ntp: buffer overflow in ntpq
499694 - CVE-2009-1252 ntp: remote arbitrary code execution vulnerability if autokeys is enabled

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:

i386:
ntp-4.2.2p1-9.el5_3.2.i386.rpm
ntp-debuginfo-4.2.2p1-9.el5_3.2.i386.rpm

x86_64:
ntp-4.2.2p1-9.el5_3.2.x86_64.rpm
ntp-debuginfo-4.2.2p1-9.el5_3.2.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:

i386:
ntp-4.2.2p1-9.el5_3.2.i386.rpm
ntp-debuginfo-4.2.2p1-9.el5_3.2.i386.rpm

ia64:
ntp-4.2.2p1-9.el5_3.2.ia64.rpm
ntp-debuginfo-4.2.2p1-9.el5_3.2.ia64.rpm

ppc:
ntp-4.2.2p1-9.el5_3.2.ppc.rpm
ntp-debuginfo-4.2.2p1-9.el5_3.2.ppc.rpm

s390x:
ntp-4.2.2p1-9.el5_3.2.s390x.rpm
ntp-debuginfo-4.2.2p1-9.el5_3.2.s390x.rpm

x86_64:
ntp-4.2.2p1-9.el5_3.2.x86_64.rpm
ntp-debuginfo-4.2.2p1-9.el5_3.2.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key#package

7. References:

https://www.cve.org/CVERecord?id=CVE-2009-0159
https://www.cve.org/CVERecord?id=CVE-2009-1252
https://access.redhat.com/security/updates/classification#important

8. Contact:

The Red Hat security contact is .  More contact
details at https://access.redhat.com/security/team/contact

Copyright 2009 Red Hat, Inc.