ntp - security update

Several vulnerabilities were discovered in the ntp package, an
implementation of the Network Time Protocol.

• CVE-2014-9293
  ntpd generated a weak key for its internal use, with full
  administrative privileges. Attackers could use this key to
  reconfigure ntpd (or to exploit other vulnerabilities).
• CVE-2014-9294
  The ntp-keygen utility generated weak MD5 keys with insufficient
  entropy.
• CVE-2014-9295
  ntpd had several buffer overflows (both on the stack and in the
  data section), allowing remote authenticated attackers to crash
  ntpd or potentially execute arbitrary code.
• CVE-2014-9296
  The general packet processing function in ntpd did not handle an
  error case correctly.

The default ntpd configuration in Debian restricts access to localhost
(and possible the adjacent network in case of IPv6).

Keys explicitly generated by “ntp-keygen -M” should be regenerated.

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For the oldstable distribution (squeeze), these problems have been fixed in
version 4.2.6.p2+dfsg-1+deb6u1.

We recommend that you upgrade your heirloom-mailx packages.

Thanks to the Florian Weimer for the Red Hat security update.