ntp 4.2.8 MATCH_ASSOC out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in ntp 4.2.8 (Network Management Software). It has been rated as critical. Affected by this issue is the function MATCH_ASSOC. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability.

The weakness was presented 04/27/2016 by Security Team with Qihoo 360 as confirmed security notice (Website). The advisory is shared for download at support.ntp.org. This vulnerability is handled as CVE-2016-2518 since 02/20/2016. The exploitation is known to be difficult. The attack may be launched remotely. Additional levels of successful authentication are necessary for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 93352 (AIX 7.2 TL 0 : ntp (IV87939) (deprecated)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316362 (Cisco UCS 6200 Series Fabric Interconnects Multiple Vulnerabilities in Network Time Protocol Daemon (CSCuz44156)).

Upgrading to version 4.2.8p7 eliminates this vulnerability. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (112746) and Tenable (93352). See 78854, 80651, 82981 and 82982 for similar entries.






CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.4

VulDB Base Score: 8.6
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
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Class: Out-of-bounds
CWE: CWE-125 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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EPSS Percentile: 🔍

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Nessus ID: 93352
Nessus Name: AIX 7.2 TL 0 : ntp (IV87939) (deprecated)
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 862576
OpenVAS Name: SuSE Update for ntp SUSE-SU-2016:1568-1 (ntp)
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: ntp 4.2.8p7


02/20/2016 🔍
04/26/2016 +65 days 🔍
04/27/2016 +1 days 🔍
04/28/2016 +1 days 🔍
09/06/2016 +130 days 🔍
09/08/2016 +2 days 🔍
01/30/2017 +144 days 🔍
07/27/2022 +2004 days 🔍


Advisory: RHSA-2016:1141
Researcher: Security Team
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2518 (🔍)

X-Force: 112746 - NTP MATCH_ASSOC() denial of service
SecurityTracker: 1035705
SecurityFocus: 88226 - NTP CVE-2016-2518 Denial of Service Vulnerability

See also: 🔍


Created: 04/28/2016 10:48 AM
Updated: 07/27/2022 09:50 AM
Changes: 04/28/2016 10:48 AM (68), 10/29/2018 06:15 AM (20), 07/27/2022 09:50 AM (5)
Complete: 🔍


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