Microsoft Windows Server 2012/Server 2012 R2/Server 2016 DHCP Service memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
9.4 | $5k-$25k | 0.00 |
A vulnerability has been found in Microsoft Windows Server 2012/Server 2012 R2/Server 2016 (Operating System) and classified as very critical. This vulnerability affects an unknown functionality of the component DHCP Service. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:
The Windows Server DHCP service in Windows Server 2012 Gold and R2, and Windows Server 2016 allows an attacker to either run arbitrary code on the DHCP failover server or cause the DHCP service to become nonresponsive, due to a memory corruption vulnerability in the Windows Server DHCP service, aka "Windows DHCP Server Remote Code Execution Vulnerability".
The bug was discovered 09/12/2017. The weakness was disclosed 09/12/2017 as KB4038792 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability was named CVE-2017-8686 since 05/03/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 01/12/2021). The advisory points out:
A memory corruption vulnerability exists in the Windows Server DHCP service when an attacker sends specially crafted packets to a DHCP failover server. An attacker who successfully exploited the vulnerability could either run arbitrary code on the DHCP failover server or cause the DHCP service to become nonresponsive.
The vulnerability scanner Nessus provides a plugin with the ID 103128 (KB4038782: Windows 10 Version 1607 and Windows Server 2016 September 2017 Cumulative Update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l.
Applying the patch KB4038792 is able to eliminate this problem. The bugfix is ready for download at catalog.update.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (103128).
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 9.8VulDB Meta Temp Score: 9.7
VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
Vendor Base Score (Microsoft): 9.8
Vendor Vector (Microsoft): 🔍
NVD Base Score: 9.8
NVD Vector: 🔍
CVSSv2
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VulDB Base Score: 🔍
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Exploiting
Class: Memory corruptionCWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
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EPSS Percentile: 🔍
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Nessus ID: 103128
Nessus Name: KB4038782: Windows 10 Version 1607 and Windows Server 2016 September 2017 Cumulative Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Server 2012 Multiple Vulnerabilities (KB4038799)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Patch: KB4038792
Timeline
05/03/2017 🔍09/12/2017 🔍
09/12/2017 🔍
09/12/2017 🔍
09/12/2017 🔍
09/12/2017 🔍
09/12/2017 🔍
09/13/2017 🔍
01/12/2021 🔍
Sources
Vendor: microsoft.comProduct: microsoft.com
Advisory: KB4038792
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2017-8686 (🔍)
OVAL: 🔍
SecurityTracker: 1039337
SecurityFocus: 100730 - Microsoft Windows DHCP Server CVE-2017-8686 Remote Code Execution Vulnerability
Entry
Created: 09/13/2017 13:19Updated: 01/12/2021 07:10
Changes: 09/13/2017 13:19 (88), 06/06/2020 09:50 (5), 01/12/2021 07:10 (2)
Complete: 🔍
Cache ID: 18:5AB:103
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