RedHat: RHSA-2009-1651:01 Moderate: ntp security update
Summary
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)
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 or, potentially, execute arbitrary code with
the privileges of the user running the ntpq command. (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 restart automatically.
Summary
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
References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0159 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3563 http://www.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux AS version 3:
Source:
i386:
ntp-4.1.2-6.el3.i386.rpm
ntp-debuginfo-4.1.2-6.el3.i386.rpm
ia64:
ntp-4.1.2-6.el3.ia64.rpm
ntp-debuginfo-4.1.2-6.el3.ia64.rpm
ppc:
ntp-4.1.2-6.el3.ppc.rpm
ntp-debuginfo-4.1.2-6.el3.ppc.rpm
s390:
ntp-4.1.2-6.el3.s390.rpm
ntp-debuginfo-4.1.2-6.el3.s390.rpm
s390x:
ntp-4.1.2-6.el3.s390x.rpm
ntp-debuginfo-4.1.2-6.el3.s390x.rpm
x86_64:
ntp-4.1.2-6.el3.x86_64.rpm
ntp-debuginfo-4.1.2-6.el3.x86_64.rpm
Red Hat Desktop version 3:
Source:
i386:
ntp-4.1.2-6.el3.i386.rpm
ntp-debuginfo-4.1.2-6.el3.i386.rpm
x86_64:
ntp-4.1.2-6.el3.x86_64.rpm
ntp-debuginfo-4.1.2-6.el3.x86_64.rpm
Red Hat Enterprise Linux ES version 3:
Source:
i386:
ntp-4.1.2-6.el3.i386.rpm
ntp-debuginfo-4.1.2-6.el3.i386.rpm
ia64:
ntp-4.1.2-6.el3.ia64.rpm
ntp-debuginfo-4.1.2-6.el3.ia64.rpm
x86_64:
ntp-4.1.2-6.el3.x86_64.rpm
ntp-debuginfo-4.1.2-6.el3.x86_64.rpm
Red Hat Enterprise Linux WS version 3:
Source:
i386:
ntp-4.1.2-6.el3.i386.rpm
ntp-debuginfo-4.1.2-6.el3.i386.rpm
ia64:
ntp-4.1.2-6.el3.ia64.rpm
ntp-debuginfo-4.1.2-6.el3.ia64.rpm
x86_64:
ntp-4.1.2-6.el3.x86_64.rpm
ntp-debuginfo-4.1.2-6.el3.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://www.redhat.com/security/team/key/#package
Topic
An updated ntp package that fixes two security issues is now available forRed Hat Enterprise Linux 3.This update has been rated as having moderate security impact by the RedHat Security Response Team.
Topic
Relevant Releases Architectures
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Bugs Fixed
490617 - CVE-2009-0159 ntp: buffer overflow in ntpq
531213 - CVE-2009-3563 ntpd: DoS with mode 7 packets (VU#568372)