(Red Hat Issues Fix) ntp Buffer Overflow in ntpq cookedprint() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID: 1022249|
SecurityTracker URL: http://securitytracker.com/id/1022249
(Links to External Site)
Date: May 18 2009
Execution of arbitrary code via network, User access via network|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): 4.2.4p6 and prior versions|
A vulnerability was reported in ntpq. A remote user can execute arbitrary code on the target system.|
A remote user can send specially crafted data to trigger a stack overflow and execute arbitrary code on the target system. The code will run with the privileges of the target service.
Apple reported this vulnerability.
On June 25, 2009, Sun reported that Solaris is not affected by this vulnerability [http://blogs.sun.com/security/entry/solaris_not_impacted_by_cve].
A remote user can execute arbitrary code on the target system.|
Red Hat has released a fix.|
The Red Hat advisory is available at:
Vendor URL: ntp.org/ (Links to External Site)
|Underlying OS: Linux (Red Hat Enterprise)|
|Underlying OS Comments: 5|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2009:1039-01] Important: ntp security update|
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Red Hat Security Advisory
Synopsis: Important: ntp security update
Advisory ID: RHSA-2009:1039-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-1039.html
Issue date: 2009-05-18
CVE Names: CVE-2009-0159 CVE-2009-1252
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
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.
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.
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):
Red Hat Enterprise Linux (v. 5 server):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2009 Red Hat, Inc.
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