CVE-2014-9297

This collective update for the Network Time Protocol daemon (ntp) provides fixes for the following reports:

* 758253: ntp fails if a host has more than 1024 IP addresses
* 771480: sntp not able to sync against Windows ntp server.

The NTP time service could have been used for remote denial of service amplification attacks.

This issue can be fixed by the administrator as we described in our security advisory SUSE-SA:2014:001

http://lists.opensuse.org/opensuse-security-announce/2014-01/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2014-01/msg00005.html

and on

http://support.novell.com/security/cve/CVE-2013-5211.html http://support.novell.com/security/cve/CVE-2013-5211.html

this update now also replaces the default ntp.conf template to fix this problem.

Please note that if you have touched or modified ntp.conf yourself, it will not be automatically fixed, you need to merge the changes manually as described.

Additionally the following bug has been fixed:

* ntp start script does not update /var/lib/ntp/etc/localtime file if
  /etc/localtime is symlink (bnc#838458)

Security Issues:

* CVE-2013-5211
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-5211>

ntp was updated to fix four security issues.

These security issues were fixed:

• CVE-2014-9294: util/ntp-keygen.c in ntp-keygen used a weak RNG seed, which made it easier for remote attackers to defeat cryptographic protection mechanisms via a brute-force attack (bnc#910764 911792).
• CVE-2014-9293: The config_auth function in ntpd, when an auth key was not configured, improperly generated a key, which made it easier for remote attackers to defeat cryptographic protection mechanisms via a brute-force attack (bnc#910764 911792).
• CVE-2014-9298: ::1 can be spoofed on some OSes, so ACLs based on IPv6 ::1 addresses could be bypassed (bnc#911792).
• CVE-2014-9297: Information leak by not properly checking a length in several places in ntp_crypto.c (bnc#911792).

This update for ntp provides the following fixes:

* Respect NTPD_FORCE_SYNC_ON_STARTUP also for dynamic peers.
  (bnc#887957)
* Fix orphan mode. (bnc#883859)

Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2014-9750, CVE-2014-9751. Reason: this ID was intended for one issue, but was associated with two issues. Notes: All CVE users should consult CVE-2014-9750 and CVE-2014-9751 to identify the ID or IDs of interest. All references and descriptions in this candidate have been removed to prevent accidental usage

Stephen Roettger, Sebastian Krahmer, and Harlan Stenn discovered that NTP incorrectly handled the length value in extension fields. A remote attacker could use this issue to possibly obtain leaked information, or cause the NTP daemon to crash, resulting in a denial of service. (CVE-2014-9297)

Stephen Roettger discovered that NTP incorrectly handled ACLs based on certain IPv6 addresses. (CVE-2014-9298)