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.
5.1	$0-$5k	0.00

A vulnerability was found in Microsoft Windows 8.1/10/Server 2012 R2 (Operating System) and classified as problematic. This issue affects some unknown functionality of the component Hyper-V. The manipulation with an unknown input leads to a code vulnerability (Restriction). Using CWE to declare the problem leads to CWE-17. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Hyper-V in Microsoft Windows 8.1, Windows Server 2012 R2, and Windows 10 improperly processes ACL settings, which allows local users to bypass intended network-traffic restrictions via a crafted application, aka "Hyper-V Security Feature Bypass Vulnerability."

The weakness was shared 09/08/2015 as MS15-105 as confirmed bulletin (Technet). It is possible to read the advisory at technet.microsoft.com. The identification of this vulnerability is CVE-2015-2534. Attacking locally is a requirement. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 85848 (MS15-105: Vulnerability in Windows Hyper-V Could Allow Security Feature Bypass (3091287)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins.

Applying the patch MS15-105 is able to eliminate this problem. The bugfix is ready for download at technet.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 (85848). The entries 77640, 77636 and 77635 are related to this item.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 8.1
• 10
• Server 2012 R2

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Name: Restriction
Class: Code / Restriction
CWE: CWE-17
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 85848
Nessus Name: MS15-105: Vulnerability in Windows Hyper-V Could Allow Security Feature Bypass (3091287)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: MS15-105

Timelineinfo

03/19/2015 🔍
09/08/2015 +173 days 🔍
09/08/2015 +0 days 🔍
09/08/2015 +0 days 🔍
09/08/2015 +0 days 🔍
09/08/2015 +0 days 🔍
09/09/2015 +1 days 🔍
09/09/2015 +0 days 🔍
06/14/2022 +2470 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS15-105
Status: Confirmed

CVE: CVE-2015-2534 (🔍)
SecurityTracker: 1033496 - Microsoft Hyper-V ACL Flaw Lets Local Users Bypass Security Restrictions
Vulnerability Center: 52540 - [MS15-105] Microsoft Windows Hyper-V Local Security Bypass Vulnerability via Crafted Application, Low
SecurityFocus: 76604

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

Entryinfo

Created: 09/09/2015 10:07
Updated: 06/14/2022 17:59
Changes: 09/09/2015 10:07 (47), 04/07/2017 16:05 (16), 06/14/2022 17:43 (2), 06/14/2022 17:51 (7), 06/14/2022 17:59 (1)
Complete: 🔍

Discussion

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