Microsoft Windows 7 SP1 up to Server 2016 Kernel information disclosure

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CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

A vulnerability, which was classified as problematic, has been found in Microsoft Windows (Operating System). Affected by this issue is some unknown processing of the component Kernel. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. Impacted is confidentiality.

The bug was discovered 10/10/2017. The weakness was published 10/10/2017 by Mateusz Jurczyk with Google Project Zero as KB4041690 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. This vulnerability is handled as CVE-2017-11785 since 07/31/2017. The exploitation is known to be difficult. Local access is required to approach this attack. Required for exploitation is a simple authentication. Technical details are unknown but a public exploit is available. The advisory points out:

An information disclosure vulnerability exists in the Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (ASLR) bypass. An attacker who successfully exploited the vulnerability could retrieve the memory address of a kernel object. To exploit the vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The security update addresses the vulnerability by correcting how the Windows kernel handles memory addresses.

It is declared as proof-of-concept. The exploit is available at exploit-db.com. The vulnerability scanner Nessus provides a plugin with the ID 103745 (KB4041676: Windows 10 Version 1703 October 2017 Cumulative Update (KRACK)), 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 local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91411 (Microsoft Windows Security Update October 2017 (KRACK Attack) (ROCA)).

Applying the patch KB4041690 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 databases at SecurityFocus (BID 101149), SecurityTracker (ID 1039526) and Tenable (103745). Similar entries are available at 107699, 107701, 107702 and 107704.

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VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 3.8

VulDB Base Score: 2.5
VulDB Temp Score: 2.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 4.7
Vendor Vector (Microsoft): 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfoedit

Class: Information disclosure
CWE: CWE-200
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103745
Nessus Name: KB4041676: Windows 10 Version 1703 October 2017 Cumulative Update (KRACK)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Multiple Vulnerabilities (KB4042895)
OpenVAS File: 🔍
OpenVAS Family: 🔍

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Exploit-DB: 🔍

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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

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Patch: KB4041690

Timelineinfoedit

07/31/2017 🔍
10/10/2017 +71 days 🔍
10/10/2017 +0 days 🔍
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10/10/2017 +0 days 🔍
10/10/2017 +0 days 🔍
10/11/2017 +1 days 🔍
10/13/2017 +2 days 🔍
01/16/2021 +1191 days 🔍

Sourcesinfoedit

Vendor: https://www.microsoft.com/
Product: https://www.microsoft.com/en-us/windows

Advisory: KB4041690
Researcher: Mateusz Jurczyk
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-11785 (🔍)
OVAL: 🔍

SecurityFocus: 101149 - Microsoft Windows Kernel CVE-2017-11785 Local Information Disclosure Vulnerability
SecurityTracker: 1039526

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

Entryinfoedit

Created: 10/11/2017 11:38 PM
Updated: 01/16/2021 04:06 PM
Changes: (3) source_cve_nvd_summary source_sectracker vulnerability_cvss2_nvd_basescore
Complete: 🔍

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