Microsoft Windows Vista SP2 up to Server 2012 R2 Kernel input validation

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4.8$0-$5k0.00

A vulnerability was found in Microsoft Windows Vista SP2 up to Server 2012 R2 (Operating System) and classified as problematic. Affected by this issue is an unknown part of the component Kernel. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The kernel in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 mishandles junctions during mountpoint creation, which makes it easier for local users to gain privileges by leveraging certain sandbox access, aka "Windows Mount Point Elevation of Privilege Vulnerability."

The weakness was presented 10/13/2015 by James Forshaw with Google Project Zero as MS15-111 as confirmed bulletin (Technet). The advisory is shared for download at technet.microsoft.com. This vulnerability is handled as CVE-2015-2553 since 03/19/2015. The attack needs to be approached locally. A simple authentication is necessary for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Google Security Research and been published 2 days after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 86373 (MS15-111: Security Update for Windows Kernel to Address Elevation of Privilege (3096447)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91100 (Microsoft Windows Kernel Elevation of Privilege Vulnerabilities (MS15-111)).

Applying the patch MS15-111 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 databases at Tenable (86373) and Exploit-DB (38474). trustwave.com is providing further details. See 78362, 78363, 78364 and 78365 for similar entries.

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CPE 2.3info

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VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
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Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Google Security Research
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Nessus ID: 86373
Nessus Name: MS15-111: Security Update for Windows Kernel to Address Elevation of Privilege (3096447)
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Countermeasuresinfo

Recommended: Patch
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Patch: MS15-111
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Timelineinfo

03/19/2015 🔍
10/13/2015 +208 days 🔍
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10/15/2015 +1 days 🔍
10/15/2015 +0 days 🔍
06/20/2022 +2440 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS15-111
Researcher: James Forshaw
Organization: Google Project Zero
Status: Confirmed

CVE: CVE-2015-2553 (🔍)
SecurityTracker: 1033805 - Windows Kernel Flaws Let Local Users Gain System Privileges and Bypass Windows Trusted Boot Policy
Vulnerability Center: 53407 - [MS15-111] Microsoft Windows Local Privilege Escalation Vulnerability - CVE-2015-2553, High
SecurityFocus: 77004 - Microsoft Windows Mount Point CVE-2015-2553 Local Privilege Escalation Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161215
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Entryinfo

Created: 10/14/2015 10:34
Updated: 06/20/2022 17:26
Changes: 10/14/2015 10:34 (71), 05/03/2019 08:03 (18), 06/20/2022 17:26 (2)
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