F5 Networks BIG-IP : NTP vulnerability (K17114)

This script is Copyright (C) 2018 Tenable Network Security, Inc.


Synopsis :

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

Description :

ntpd in ntp before 4.2.8p3 with remote configuration enabled allows
remote authenticated users with knowledge of the configuration
password and access to a computer entrusted to perform remote
configuration to cause a denial of service (service crash) via a NULL
byte in a crafted configuration directive packet. (CVE-2015-5146)

An attacker can use a specially crafted package to cause ntpd to
become unresponsive when all of the following conditions are met :

The ntpd configuration has enabled remote configuration.

The attacker has knowledge of the configuration password.

The attacker has access to a computer entrusted to perform remote
configurations.

Impact

For BIG-IP systems using a default network time protocol (NTP)
configuration, there is no impact. However, BIG-IP systems with an NTP
configuration that is customized in line with the requirements of the
advisory may be vulnerable.

See also :

https://support.f5.com/csp/#/article/K17114

Solution :

Upgrade to one of the non-vulnerable versions listed in the F5
Solution K17114.

Risk factor :

Low / CVSS Base Score : 3.5
(CVSS2#AV:N/AC:M/Au:S/C:N/I:N/A:P)
CVSS Temporal Score : 2.9
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: F5 Networks Local Security Checks

Nessus Plugin ID: 105510 ()

Bugtraq ID: 75589

CVE ID: CVE-2015-5146

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