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AIX NTP v4 Advisory : ntp_advisory6.asc (IV83983) (IV83992)

medium Nessus Plugin ID 92357

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Synopsis

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

Description

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

 - A flaw exists in the receive() function due to the use of authenticated broadcast mode. A man-in-the-middle attacker can exploit this to conduct a replay attack.
 (CVE-2015-7973)

 - A NULL pointer dereference flaw exists in ntp_request.c that is triggered when handling ntpdc relist commands.
 A remote attacker can exploit this, via a specially crafted request, to crash the service, resulting in a denial of service condition. (CVE-2015-7977)

 - An unspecified flaw exists in authenticated broadcast mode. A remote attacker can exploit this, via specially crafted packets, to cause a denial of service condition.
 (CVE-2015-7979)

 - A flaw exists in ntpq and ntpdc that allows a remote attacker to disclose sensitive information in timestamps. (CVE-2015-8139)

 - A flaw exists in the ntpq protocol that is triggered during the handling of an improper sequence of numbers.
 A man-in-the-middle attacker can exploit this to conduct a replay attack. (CVE-2015-8140)

 - A flaw exists in the ntpq client that is triggered when handling packets that cause a loop in the getresponse() function. A remote attacker can exploit this to cause an infinite loop, resulting in a denial of service condition. (CVE-2015-8158)

Solution

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

See Also

https://aix.software.ibm.com/aix/efixes/security/ntp_advisory6.asc

Plugin Details

Severity: Medium

ID: 92357

File Name: aix_ntp_v4_advisory6.nasl

Version: 1.14

Type: local

Published: 7/18/2016

Updated: 1/30/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2015-8140

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

CVSS Score Source: CVE-2015-7973

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/16/2016

Vulnerability Publication Date: 10/17/2015

Reference Information

CVE: CVE-2015-7973, CVE-2015-7977, CVE-2015-7979, CVE-2015-8139, CVE-2015-8140, CVE-2015-8158

BID: 81814, 81815, 81816, 81963, 82102, 82105

CERT: 718152