AIX NTP v3 Advisory : ntp_advisory7.asc (IV87614) (IV87419) (IV87615) (IV87420) (IV87939)

medium Nessus Plugin ID 102128


The remote AIX host has a version of NTP installed that is affected by multiple vulnerabilities.


The version of NTP installed on the remote AIX host is affected by the following vulnerabilities :

- A time serving flaw exists in the trusted key system due to improper key checks. An authenticated, remote attacker can exploit this to perform impersonation attacks between authenticated peers. (CVE-2015-7974)

- An information disclosure vulnerability exists in the message authentication functionality in libntp that is triggered during the handling of a series of specially crafted messages. An adjacent attacker can exploit this to partially recover the message digest key.

- A flaw exists due to improper filtering of IPv4 'bogon' packets received from a network. An unauthenticated, remote attacker can exploit this to spoof packets to appear to come from a specific reference clock.

- A denial of service vulnerability exists that allows an authenticated, remote attacker to manipulate the value of the trustedkey, controlkey, or requestkey via a crafted packet, preventing authentication with ntpd until the daemon has been restarted. (CVE-2016-2517)

- An out-of-bounds read error exists in the MATCH_ASSOC() function that occurs during the creation of peer associations with hmode greater than 7. An authenticated, remote attacker can exploit this, via a specially crafted packet, to cause a denial of service.

- An overflow condition exists in the ctl_getitem() function in ntpd due to improper validation of user-supplied input when reporting return values. An authenticated, remote attacker can exploit this to cause ntpd to abort. (CVE-2016-2519)


A fix is available and can be downloaded from the IBM AIX website.

See Also

Plugin Details

Severity: Medium

ID: 102128

File Name: aix_ntp_v3_advisory7.nasl

Version: 3.10

Type: local

Published: 8/3/2017

Updated: 4/21/2023

Risk Information


Risk Factor: Medium

Score: 5.2


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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


Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:ibm:aix, cpe:/a:ntp:ntp

Required KB Items: Host/AIX/lslpp, Host/local_checks_enabled, Host/AIX/version

Patch Publication Date: 9/6/2016

Vulnerability Publication Date: 12/12/2015

Reference Information

CVE: CVE-2015-7974, CVE-2016-1550, CVE-2016-1551, CVE-2016-2517, CVE-2016-2518, CVE-2016-2519

BID: 81960, 88189, 88204, 88219, 88226, 88261

CERT: 718152