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Red Hat 3: RHSA-2009:1651-01 Moderate: ntp DoS and Buffer Overflow

red hat
Calendar Grey December 8, 2009
Dist Redhat Esm H88
Important ntp upgrade for Fedora tackles significant vulnerabilities. Update today to protect your environment.
An updated ntp package that fixes two security issues is now available for Red Hat Enterprise Linux 3. This update has been rated as having moderate security impact by the Red Hat...

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

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.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow DoS ntp

References

https://www.cve.org/CVERecord?id=CVE-2009-0159 https://www.cve.org/CVERecord?id=CVE-2009-3563 https://access.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://access.redhat.com/security/team/key#package


Advisory ID: RHSA-2009:1651-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2009:1651.html
Issue date: 2009-12-08

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.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow DoS ntp

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)

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