AIX NTP v4 Advisory : ntp_advisory9.asc (IV96311) (IV96312)

Medium Nessus Plugin ID 102131

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VPR Score: 6.7


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 :

- Multiple stack-based buffer overflow conditions exist in various wrappers around the ctl_putdata() function within file ntpd/ntp_control.c due to improper validation of certain input from the ntp.conf file.
An unauthenticated, remote attacker can exploit these, by convincing a user into deploying a specially crafted ntp.conf file, to cause a denial of service condition or possibly the execution of arbitrary code.

- A stack-based buffer overflow condition exists in the datum_pts_receive() function within file ntpd/refclock_datum.c when handling handling packets from the '/dev/datum' device due to improper validation of certain input. A local attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-6462)

- A denial of service vulnerability exists when handling configuration directives. An authenticated, remote attacker can exploit this, via a malformed 'mode' configuration directive, to crash the ntpd daemon.


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

See Also

Plugin Details

Severity: Medium

ID: 102131

File Name: aix_ntp_v4_advisory9.nasl

Version: 3.8

Type: local

Published: 2017/08/03

Updated: 2018/07/17

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 6.7

CVSS v2.0

Base Score: 6.5

Temporal Score: 4.8

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 8.8

Temporal Score: 7.7

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

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: 2017/07/06

Vulnerability Publication Date: 2017/02/12

Reference Information

CVE: CVE-2017-6458, CVE-2017-6462, CVE-2017-6464

BID: 97045, 97050, 97051

CERT: 325339