ntp security update

CentOS Errata and Security Advisory CESA-2009:1040

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.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2009-May/078046.html
https://lists.centos.org/pipermail/centos-announce/2009-May/078057.html

Affected packages:
ntp

Upstream details at:
https://access.redhat.com/errata/RHSA-2009:1040