1. Ubuntu Security Notices
  2. USN-2567-1

USN-2567-1: NTP vulnerabilities

Publication date

13 April 2015

Overview

Several security issues were fixed in NTP.

Releases

Packages

  • ntp - Network Time Protocol daemon and utility programs

Details

Miroslav Lichvar discovered that NTP incorrectly validated MAC fields. A
remote attacker could possibly use this issue to bypass authentication and
spoof packets. (CVE-2015-1798)

Miroslav Lichvar discovered that NTP incorrectly handled certain invalid
packets. A remote attacker could possibly use this issue to cause a denial
of service. (CVE-2015-1799)

Juergen Perlinger discovered that NTP incorrectly generated MD5 keys on
big-endian platforms. This issue could either cause ntp-keygen to hang, or
could result in non-random keys. (CVE number pending)

Miroslav Lichvar discovered that NTP incorrectly validated MAC fields. A
remote attacker could possibly use this issue to bypass authentication and
spoof packets. (CVE-2015-1798)

Miroslav Lichvar discovered that NTP incorrectly handled certain invalid
packets. A remote attacker could possibly use this issue to cause a denial
of service. (CVE-2015-1799)

Juergen Perlinger discovered that NTP incorrectly generated MD5 keys on
big-endian platforms. This issue could either cause ntp-keygen to hang, or
could result in non-random keys. (CVE number pending)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
14.10 utopic ntp –  1:4.2.6.p5+dfsg-3ubuntu2.14.10.3
14.04 trusty ntp –  1:4.2.6.p5+dfsg-3ubuntu2.14.04.3
12.04 precise ntp –  1:4.2.6.p3+dfsg-1ubuntu3.4

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References

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