Ubuntu 12.04 LTS / 14.04 LTS / 14.10 : ntp vulnerabilities (USN-2567-1)

Medium Nessus Plugin ID 82765


The remote Ubuntu host is missing a security-related patch.


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).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected ntp package.

Plugin Details

Severity: Medium

ID: 82765

File Name: ubuntu_USN-2567-1.nasl

Version: $Revision: 1.4 $

Type: local

Agent: unix

Published: 2015/04/14

Modified: 2016/05/24

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 4.3

Temporal Score: 3.6

Vector: CVSS2#AV:A/AC:M/Au:N/C:N/I:P/A:P

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:ntp, cpe:/o:canonical:ubuntu_linux:12.04:-:lts, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:14.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/04/13

Reference Information

CVE: CVE-2015-1798, CVE-2015-1799

BID: 73950, 73951

OSVDB: 120350, 120351

USN: 2567-1