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Red Hat 4: RHSA-2009-1040-02 Critical NTP Buffer Overflow Advisory

red hat
Calendar Grey May 18, 2009
Dist Redhat Esm H88
Revised ntp distribution for Red Hat addresses severe vulnerabilities, preventing external breaches on systems running Red Hat Enterprise Linux.
An updated ntp package that fixes two security issues is now available for Red Hat Enterprise Linux 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

Summary

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 or, potentially, execute arbitrary code with the privileges of the "ntp" user. (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 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 be restarted automatically.

Topics%20covered

Topics Covered

security advisory buffer overflow critical Red Hat Enterprise Linux remote execution ntp

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#critical

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: ntp-4.2.0.a.20040617-8.el4_7.2.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.i386.rpm
ia64: ntp-4.2.0.a.20040617-8.el4_7.2.ia64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.ia64.rpm
ppc: ntp-4.2.0.a.20040617-8.el4_7.2.ppc.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.ppc.rpm
s390: ntp-4.2.0.a.20040617-8.el4_7.2.s390.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.s390.rpm
s390x: ntp-4.2.0.a.20040617-8.el4_7.2.s390x.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.s390x.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_7.2.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.x86_64.rpm
Red Hat Enterprise Linux AS version 4.7.z:
Source:
i386: ntp-4.2.0.a.20040617-8.el4_7.2.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.i386.rpm
ia64: ntp-4.2.0.a.20040617-8.el4_7.2.ia64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.ia64.rpm
ppc: ntp-4.2.0.a.20040617-8.el4_7.2.ppc.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.ppc.rpm
s390: ntp-4.2.0.a.20040617-8.el4_7.2.s390.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.s390.rpm
s390x: ntp-4.2.0.a.20040617-8.el4_7.2.s390x.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.s390x.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_7.2.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.2.x86_64.rpm


Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2009:1040-02
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2009:1040.html
Issue date: 2009-05-18

Topic

An updated ntp package that fixes two security issues is now available forRed Hat Enterprise Linux 4.This update has been rated as having critical security impact by the RedHat Security Response Team.

Topics%20covered

Topics Covered

security advisory buffer overflow critical Red Hat Enterprise Linux remote execution ntp

Relevant Releases Architectures

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux AS version 4.7.z - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux ES version 4.7.z - i386, ia64, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Bugs Fixed

490617 - CVE-2009-0159 ntp: buffer overflow in ntpq

499694 - CVE-2009-1252 ntp: remote arbitrary code execution vulnerability if autokeys is enabled

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