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Ubuntu Security Notice USN-2497-1

Ubuntu Security Notice USN-2497-1
Posted Feb 9, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2497-1 - 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. Stephen Roettger discovered that NTP incorrectly handled ACLs based on certain IPv6 addresses.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2014-9297, CVE-2014-9298
SHA-256 | 4f2ff3a4f845a75182dbeab18b0ed522016c38a4abb92f02a822a4c46c7edd86

Ubuntu Security Notice USN-2497-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2497-1
February 09, 2015

ntp vulnerabilities
============================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in NTP.

Software Description:
- ntp: Network Time Protocol daemon and utility programs

Details:

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)

Update instructions:

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

Ubuntu 14.10:
ntp 1:4.2.6.p5+dfsg-3ubuntu2.14.10.2

Ubuntu 14.04 LTS:
ntp 1:4.2.6.p5+dfsg-3ubuntu2.14.04.2

Ubuntu 12.04 LTS:
ntp 1:4.2.6.p3+dfsg-1ubuntu3.3

Ubuntu 10.04 LTS:
ntp 1:4.2.4p8+dfsg-1ubuntu2.3

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

References:
http://www.ubuntu.com/usn/usn-2497-1
CVE-2014-9297, CVE-2014-9298

Package Information:
https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p5+dfsg-3ubuntu2.14.10.2
https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p5+dfsg-3ubuntu2.14.04.2
https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p3+dfsg-1ubuntu3.3
https://launchpad.net/ubuntu/+source/ntp/1:4.2.4p8+dfsg-1ubuntu2.3
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