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Vulnerability of NTP.org: information disclosure via GET_RESTRICT

Synthesis of the vulnerability 

An attacker can use the GET_RESTRICT private message of NTP.org, in order to obtain sensitive information.
Vulnerable products: BIG-IP Hardware, TMOS, AIX, Meinberg NTP Server, NTP.org, VxWorks.
Severity of this weakness: 2/4.
Creation date: 03/08/2016.
Références of this bulletin: CVE-2014-5209, K44942017, SOL44942017, VIGILANCE-VUL-20304.

Description of the vulnerability 

The NTP.org product implements the GET_RESTRICT private query (on XNTPD_OLD and XNTPD), which obtains the list of servers with restrictions.

However, an attacker can use this list to obtain IP addresses.

An attacker can therefore use the GET_RESTRICT private message of NTP.org, in order to obtain sensitive information.
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This cybersecurity vulnerability impacts software or systems such as BIG-IP Hardware, TMOS, AIX, Meinberg NTP Server, NTP.org, VxWorks.

Our Vigil@nce team determined that the severity of this vulnerability is medium.

The trust level is of type unique source, with an origin of intranet client.

An attacker with a expert ability can exploit this weakness alert.

Solutions for this threat 

AIX: patch for NTP (16/08/2018).
A patch is indicated in information sources.

F5 BIG-IP: solution for NTP GET_RESTRICT.
The solution is indicated in information sources.

Wind River VxWorks: solution for NTP.
The solution is indicated in information sources.
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