Microsoft Windows 10/Server 2016 Update Delivery Optimization access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows 10/Server 2016 and classified as problematic. This issue affects some unknown processing of the component Update Delivery Optimization. The manipulation leads to access control. The identification of this vulnerability is CVE-2017-11829. Attacking locally is a requirement. There is no exploit available. It is recommended to apply a patch to fix this issue. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability has been found in Microsoft Windows 10/Server 2016 (Operating System) and classified as problematic. This vulnerability affects an unknown functionality of the component Update Delivery Optimization. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect integrity. CVE summarizes:

Microsoft Windows 10 allows an elevation of privilege vulnerability when the Windows Update Delivery Optimization does not properly enforce file share permissions.

The bug was discovered 10/10/2017. The weakness was disclosed 10/10/2017 with Microsoft as KB4041691 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability was named CVE-2017-11829 since 07/31/2017. The attack needs to be approached locally. The successful exploitation needs a single authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

An elevation of privilege vulnerability exists when the Windows Update Delivery Optimization does not properly enforce file share permissions. An attacker who successfully exploited the vulnerability could overwrite files that require higher privileges than what the attacker already has.

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 l. 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 KB4041691 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 Tenable (103745) and SecurityFocus (BID 101213†). The entries VDB-107699, VDB-107701, VDB-107702 and VDB-107704 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 5.5
Vendor Vector (Microsoft): 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

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 (KB4041691)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: KB4041691

Timelineinfo

07/31/2017 🔍
10/10/2017 +71 days 🔍
10/10/2017 +0 days 🔍
10/10/2017 +0 days 🔍
10/10/2017 +0 days 🔍
10/10/2017 +0 days 🔍
10/11/2017 +1 days 🔍
10/13/2017 +2 days 🔍
09/10/2024 +2524 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: KB4041691
Researcher: Microsoft
Organization: Microsoft
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-11829 (🔍)
GCVE (CVE): GCVE-0-2017-11829
GCVE (VulDB): GCVE-100-107752

OVAL: 🔍

SecurityFocus: 101213 - Microsoft Windows CVE-2017-11829 Local Privilege Escalation Vulnerability
SecurityTracker: 1039526

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

Entryinfo

Created: 10/11/2017 23:38
Updated: 09/10/2024 23:58
Changes: 10/11/2017 23:38 (87), 11/24/2019 08:04 (6), 01/16/2021 16:20 (2), 01/16/2021 16:26 (1), 09/10/2024 23:58 (17)
Complete: 🔍
Cache ID: 216:F21:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!