Synopsis

Important: ntp security update

Type/Severity

Security Advisory: Important

Topic

Updated ntp packages that fix several security issues are now available for
Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

Description

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

Multiple buffer overflow flaws were discovered in ntpd's crypto_recv(),
ctl_putdata(), and configure() functions. A remote attacker could use
either of these flaws to send a specially crafted request packet that could
crash ntpd or, potentially, execute arbitrary code with the privileges of
the ntp user. Note: the crypto_recv() flaw requires non-default
configurations to be active, while the ctl_putdata() flaw, by default, can
only be exploited via local attackers, and the configure() flaw requires
additional authentication to exploit. (CVE-2014-9295)

It was found that ntpd automatically generated weak keys for its internal
use if no ntpdc request authentication key was specified in the ntp.conf
configuration file. A remote attacker able to match the configured IP
restrictions could guess the generated key, and possibly use it to send
ntpdc query or configuration requests. (CVE-2014-9293)

It was found that ntp-keygen used a weak method for generating MD5 keys.
This could possibly allow an attacker to guess generated MD5 keys that
could then be used to spoof an NTP client or server. Note: it is
recommended to regenerate any MD5 keys that had explicitly been generated
with ntp-keygen; the default installation does not contain such keys).
(CVE-2014-9294)

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.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 1176032 - CVE-2014-9293 ntp: automatic generation of weak default key in config_auth()
• BZ - 1176035 - CVE-2014-9294 ntp: ntp-keygen uses weak random number generator and seed when generating MD5 keys
• BZ - 1176037 - CVE-2014-9295 ntp: Multiple buffer overflows via specially-crafted packets

CVEs

• CVE-2014-9294
• CVE-2014-9295
• CVE-2014-9293

References

• https://access.redhat.com/security/updates/classification/#important

Red Hat Enterprise Linux Server 5

SRPM
ntp-4.2.2p1-18.el5_11.src.rpm	SHA-256: 8f0ccf4707db66bc41ea01c6119bfec0d2dba126a11c39e359966057928299f9
x86_64
ntp-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: a1fdb05bdf0fb3641725ef5e491d240ab804203a768593ab1fbd303c626324f1
ntp-debuginfo-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: f8d4540d899c7a34c17c09cb2472b5a46761e6ecfbc4d25b47b042b1115d529b
ia64
ntp-4.2.2p1-18.el5_11.ia64.rpm	SHA-256: 0d3e4156f255f1461f6df1521a78ed1978c509cc9cb9233afe1ead53edb049fb
ntp-debuginfo-4.2.2p1-18.el5_11.ia64.rpm	SHA-256: 7f87470f2958e7bcd2524b042be873778194b8bc2da9d3ab66531cb12947a6d8
i386
ntp-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 94afc65ee6e0ee540563aac2507695df2e3368f92e00f3dc64eabbce5e4d2e50
ntp-debuginfo-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 5b3712dc6d046f1ebce1b90b18ad772628a37240332e4fe1f510d51f4cf3b5fe

Red Hat Enterprise Linux Workstation 5

SRPM
ntp-4.2.2p1-18.el5_11.src.rpm	SHA-256: 8f0ccf4707db66bc41ea01c6119bfec0d2dba126a11c39e359966057928299f9
x86_64
ntp-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: a1fdb05bdf0fb3641725ef5e491d240ab804203a768593ab1fbd303c626324f1
ntp-debuginfo-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: f8d4540d899c7a34c17c09cb2472b5a46761e6ecfbc4d25b47b042b1115d529b
i386
ntp-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 94afc65ee6e0ee540563aac2507695df2e3368f92e00f3dc64eabbce5e4d2e50
ntp-debuginfo-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 5b3712dc6d046f1ebce1b90b18ad772628a37240332e4fe1f510d51f4cf3b5fe

Red Hat Enterprise Linux Desktop 5

SRPM
ntp-4.2.2p1-18.el5_11.src.rpm	SHA-256: 8f0ccf4707db66bc41ea01c6119bfec0d2dba126a11c39e359966057928299f9
x86_64
ntp-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: a1fdb05bdf0fb3641725ef5e491d240ab804203a768593ab1fbd303c626324f1
ntp-debuginfo-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: f8d4540d899c7a34c17c09cb2472b5a46761e6ecfbc4d25b47b042b1115d529b
i386
ntp-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 94afc65ee6e0ee540563aac2507695df2e3368f92e00f3dc64eabbce5e4d2e50
ntp-debuginfo-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 5b3712dc6d046f1ebce1b90b18ad772628a37240332e4fe1f510d51f4cf3b5fe

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
ntp-4.2.2p1-18.el5_11.src.rpm	SHA-256: 8f0ccf4707db66bc41ea01c6119bfec0d2dba126a11c39e359966057928299f9
s390x
ntp-4.2.2p1-18.el5_11.s390x.rpm	SHA-256: 8c5cab63b1d309d1865c77c639f26d122849c017dd359edde3efb5c7e9d73f5f
ntp-debuginfo-4.2.2p1-18.el5_11.s390x.rpm	SHA-256: a1e2beeb60aa56c8bde4e77f614ff74029b1531bd6ead7f2fc4bd84f306ab638

Red Hat Enterprise Linux for Power, big endian 5

SRPM
ntp-4.2.2p1-18.el5_11.src.rpm	SHA-256: 8f0ccf4707db66bc41ea01c6119bfec0d2dba126a11c39e359966057928299f9
ppc
ntp-4.2.2p1-18.el5_11.ppc.rpm	SHA-256: f3ad9d4135ff65277360326014211a4a5f5775cc391309c1e8d6c31c5c76a087
ntp-debuginfo-4.2.2p1-18.el5_11.ppc.rpm	SHA-256: 776f9cdff989ea89007352291d20b72ed63a1bf85528e805e764c87d1891a119

Red Hat Enterprise Linux Server from RHUI 5

SRPM
ntp-4.2.2p1-18.el5_11.src.rpm	SHA-256: 8f0ccf4707db66bc41ea01c6119bfec0d2dba126a11c39e359966057928299f9
x86_64
ntp-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: a1fdb05bdf0fb3641725ef5e491d240ab804203a768593ab1fbd303c626324f1
ntp-debuginfo-4.2.2p1-18.el5_11.x86_64.rpm	SHA-256: f8d4540d899c7a34c17c09cb2472b5a46761e6ecfbc4d25b47b042b1115d529b
i386
ntp-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 94afc65ee6e0ee540563aac2507695df2e3368f92e00f3dc64eabbce5e4d2e50
ntp-debuginfo-4.2.2p1-18.el5_11.i386.rpm	SHA-256: 5b3712dc6d046f1ebce1b90b18ad772628a37240332e4fe1f510d51f4cf3b5fe