ntp 4.2.8p5 reslist Command resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in ntp 4.2.8p5. This affects an unknown function of the component reslist Command. Performing a manipulation results in resource consumption. This vulnerability is cataloged as CVE-2015-7978. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in ntp 4.2.8p5 (Network Management Software). This affects some unknown functionality of the component reslist Command. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on integrity, and availability. The summary by CVE is:

NTP before 4.2.8p6 and 4.3.0 before 4.3.90 allows a remote attackers to cause a denial of service (stack exhaustion) via an ntpdc relist command, which triggers recursive traversal of the restriction list.

The weakness was shared 01/19/2016 with Cisco as confirmed security notice (Website). The advisory is shared at support.ntp.org. This vulnerability is uniquely identified as CVE-2015-7978 since 10/23/2015. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 88054 (Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p6 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157189 (Oracle Enterprise Linux Security Update for ntp (ELSA-2016-0780)).

Upgrading to version 4.2.8p6 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (110023), Tenable (88054), SecurityFocus (BID 81962†) and Vulnerability Center (SBV-56274†). The entries VDB-78936, VDB-78937, VDB-78938 and VDB-80644 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.8
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88054
Nessus Name: Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p6 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 900567
OpenVAS Name: Fedora Update for ntp FEDORA-2016-8
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ntp 4.2.8p6

Timelineinfo

10/23/2015 🔍
01/19/2016 +88 days 🔍
01/19/2016 +0 days 🔍
01/20/2016 +1 days 🔍
01/21/2016 +1 days 🔍
01/25/2016 +4 days 🔍
01/26/2016 +1 days 🔍
01/29/2016 +3 days 🔍
01/30/2017 +367 days 🔍
05/17/2026 +3393 days 🔍

Sourcesinfo

Advisory: USN-3096-1
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7978 (🔍)
GCVE (CVE): GCVE-0-2015-7978
GCVE (VulDB): GCVE-100-80649

OVAL: 🔍

X-Force: 110023 - NTP reslist command denial of service
SecurityFocus: 81962 - NTP CVE-2015-7978 Denial of Service Vulnerability
SecurityTracker: 1034782
Vulnerability Center: 56274 - [cisco-sa-20160127-ntpd] Cisco Multiple Products Remote DoS and Security Bypass due to an Issue in NTP Server - CVE-2015-7978, High

See also: 🔍

Entryinfo

Created: 01/25/2016 13:50
Updated: 05/17/2026 01:03
Changes: 01/25/2016 13:50 (71), 07/22/2018 10:23 (19), 07/06/2022 08:48 (5), 05/17/2026 01:03 (15)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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