ntpd up to 4.2.8p7 Validation ntp_proto.c receive race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in ntpd up to 4.2.8p7. This issue affects the function receive of the file ntp_proto.c of the component Validation Handler. This manipulation causes race condition. This vulnerability is handled as CVE-2016-4954. The attack can be initiated remotely. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as critical was found in ntpd up to 4.2.8p7 (Network Management Software). Affected by this vulnerability is the function receive of the file ntp_proto.c of the component Validation Handler. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect integrity, and availability.

The weakness was released 06/02/2016 as confirmed release notes (Website). It is possible to read the advisory at support.ntp.org. The public release was coordinated with the project team. This vulnerability is known as CVE-2016-4954 since 05/23/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 91662 (SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1563-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371401 (Cisco UCS 6200 Series Fabric Interconnects Multiple Vulnerabilities in Network Time Protocol Daemon (CSCuz92668)).

Applying the patch 4.2.8p8 is able to eliminate this problem. A possible mitigation has been published before and not just after the disclosure of the vulnerability. The release notes contains the following remark:

NTP Consortium members at the Partner and Premier levels received pre-release patch access.

The vulnerability is also documented in the databases at Tenable (91662), SecurityFocus (BID 91010†) and SecurityTracker (ID 1036037†). Additional details are provided at kb.cert.org. Entries connected to this vulnerability are available at VDB-87750, VDB-87752, VDB-87753 and VDB-87754. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 8.6
VulDB Temp Score: 8.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91662
Nessus Name: SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1563-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 862576
OpenVAS Name: SuSE Update for ntp SUSE-SU-2016:1568-1 (ntp)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 4.2.8p8

Timelineinfo

05/23/2016 🔍
05/24/2016 +1 days 🔍
05/24/2016 +0 days 🔍
06/02/2016 +9 days 🔍
06/06/2016 +4 days 🔍
06/06/2016 +0 days 🔍
06/17/2016 +11 days 🔍
07/04/2016 +17 days 🔍
12/22/2024 +3093 days 🔍

Sourcesinfo

Advisory: USN-3096-1
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-4954 (🔍)
GCVE (CVE): GCVE-0-2016-4954
GCVE (VulDB): GCVE-100-87751

OVAL: 🔍

CERT: 🔍
SecurityFocus: 91010
SecurityTracker: 1036037

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/06/2016 16:09
Updated: 12/22/2024 11:54
Changes: 06/06/2016 16:09 (77), 01/06/2019 10:26 (10), 08/23/2022 07:59 (5), 12/22/2024 11:54 (15)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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