Microsoft Windows 8.1/10/Server 2012/Server 2016 SMB Response mrxsmb20.sys null pointer dereference

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

A vulnerability was found in Microsoft Windows 8.1/10/Server 2012/Server 2016 (Operating System) and classified as critical. This issue affects an unknown code block in the library mrxsmb20.sys of the component SMB Response Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The bug was discovered 02/01/2017. The weakness was released 02/02/2017 by PythonResponder as VU#867968 as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. The public release happened without involvement of Microsoft. The identification of this vulnerability is CVE-2017-0016 since 09/09/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known.

A public exploit has been developed in Python and been published before and not just after the advisory. The exploit is available at github.com. It is declared as functional. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 97743 (MS17-012: Security Update for Microsoft Windows (4013078)), 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370297 (Microsoft Cumulative Security Update for Windows (MS17-012)).

It is possible to mitigate the problem by applying the configuration setting Disable SMB. A possible mitigation has been published 2 months after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 41499.

The vulnerability is also documented in the databases at Tenable (97743), SecurityFocus (BID 95969†) and SecurityTracker (ID 1037767†). Entries connected to this vulnerability are available at VDB-98053, VDB-98054, VDB-98055 and VDB-98056. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Functional
Programming Language: 🔍
Download: 🔍

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Nessus ID: 97743
Nessus Name: MS17-012: Security Update for Microsoft Windows (4013078)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802074
OpenVAS Name: Microsoft Windows Multiple Vulnerabilities (4013078)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Config
Status: 🔍

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

Config: Disable SMB

Snort ID: 41499
Snort Message: SERVER-SAMBA Microsoft Windows SMBv2/SMBv3 Buffer Overflow attempt
Snort Class: 🔍

Suricata ID: 2023832
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

09/09/2016 🔍
02/01/2017 +145 days 🔍
02/01/2017 +0 days 🔍
02/02/2017 +1 days 🔍
02/02/2017 +0 days 🔍
02/02/2017 +0 days 🔍
02/03/2017 +1 days 🔍
03/14/2017 +39 days 🔍
03/15/2017 +1 days 🔍
03/16/2017 +1 days 🔍
11/11/2022 +2066 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: VU#867968
Researcher: PythonResponder
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-0016 (🔍)
OVAL: 🔍

SecurityFocus: 95969 - Microsoft Windows CVE-2017-0016 Memory Corruption Vulnerability
SecurityTracker: 1037767

scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔍

Entryinfo

Created: 02/03/2017 05:03 PM
Updated: 11/11/2022 02:10 PM
Changes: 02/03/2017 05:03 PM (83), 10/20/2019 04:54 PM (22), 11/11/2022 02:10 PM (3)
Complete: 🔍
Cache ID: 18:16A:40

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