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F5 Networks BIG-IP : NTP vulnerability (K16505)

critical Nessus Plugin ID 83038

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.
(CVE-2015-1798)

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K16505.

See Also

https://support.f5.com/csp/article/K16505

Plugin Details

Severity: Critical

ID: 83038

File Name: f5_bigip_SOL16505.nasl

Version: 2.14

Type: Local

Published: 4/24/2015

Updated: 10/21/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.04

CVSS v2

Risk Factor: Low

Base Score: 1.8

Temporal Score: 1.6

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

CVSS Score Source: CVE-2015-1798

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.7

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

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

Vulnerability Information

CPE: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_application_visibility_and_reporting, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_link_controller, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/h:f5:big-ip

Required KB Items: Host/local_checks_enabled, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version

Exploit Ease: No known exploits are available

Patch Publication Date: 4/23/2015

Vulnerability Publication Date: 4/8/2015

Reference Information

CVE: CVE-2015-1798

BID: 73951