Issued:
2009-01-29
Updated:
2009-01-29

RHSA-2009:0046 - Moderate: ntp security update

Synopsis

Moderate: ntp security update

Type/Severity

Security Advisory Moderate

Topic

Updated ntp packages to correct a security issue are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Description

The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source.

A flaw was discovered in the way the ntpd daemon checked the return value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4 authentication, this could lead to an incorrect verification of cryptographic signatures, allowing time-spoofing attacks. (CVE-2009-0021)

Note: This issue only affects systems that have enabled NTP authentication. By default, NTP authentication is not enabled.

All ntp users are advised to upgrade to the updated packages, which contain a backported patch to resolve this issue. After installing the update, the ntpd daemon will restart automatically.

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 This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.3x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.3ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.3i386
Red Hat Enterprise Linux for x86_64 - Extended Update Support4.7x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support4.7ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support4.7i386
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for Power, big endian4ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support5.3ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support4.7ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux for IBM z Systems4s390x
Red Hat Enterprise Linux for IBM z Systems4s390
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support5.3s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support4.7s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support4.7s390
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Workstation4x86_64
Red Hat Enterprise Linux Workstation4ia64
Red Hat Enterprise Linux Workstation4i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server4x86_64
Red Hat Enterprise Linux Server4ia64
Red Hat Enterprise Linux Server4i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Server - AUS5.3x86_64
Red Hat Enterprise Linux Server - AUS5.3ia64
Red Hat Enterprise Linux Server - AUS5.3i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386
Red Hat Enterprise Linux Desktop4x86_64
Red Hat Enterprise Linux Desktop4i386

Updated Packages

  • ntp-4.2.0.a.20040617-8.el4_7.1.i386.rpm
  • ntp-4.2.2p1-9.el5_3.1.src.rpm
  • ntp-4.2.2p1-9.el5_3.1.ppc.rpm
  • ntp-4.2.2p1-9.el5_3.1.s390x.rpm
  • ntp-4.2.0.a.20040617-8.el4_7.1.s390.rpm
  • ntp-4.2.0.a.20040617-8.el4_7.1.src.rpm
  • ntp-4.2.0.a.20040617-8.el4_7.1.ia64.rpm
  • ntp-4.2.2p1-9.el5_3.1.ia64.rpm
  • ntp-4.2.2p1-9.el5_3.1.x86_64.rpm
  • ntp-4.2.0.a.20040617-8.el4_7.1.ppc.rpm
  • ntp-4.2.2p1-9.el5_3.1.i386.rpm
  • ntp-4.2.0.a.20040617-8.el4_7.1.s390x.rpm
  • ntp-4.2.0.a.20040617-8.el4_7.1.x86_64.rpm

Fixes

CVEs

References

Additional information