Microsoft Windows Vista SP2 up to Server 2012 RPC Subsystem access control

CVSS Meta Temp Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft Windows Vista SP2 up to Server 2012 and classified as problematic. The impacted element is an unknown function of the component RPC Subsystem. The manipulation leads to access control. This vulnerability is uniquely identified as CVE-2015-2370. Local access is required to approach this attack. Moreover, an exploit is present. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Microsoft Windows Vista SP2 up to Server 2012 (Operating System). This issue affects an unknown part of the component RPC Subsystem. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The authentication implementation in the RPC subsystem in Microsoft Windows Server 2003 SP2 and R2 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not prevent DCE/RPC connection reflection, which allows local users to gain privileges via a crafted application, aka "Windows RPC Elevation of Privilege Vulnerability."

The weakness was disclosed 07/14/2015 by monoxgas as MS15-076 as confirmed bulletin (Technet). The advisory is shared at technet.microsoft.com. The identification of this vulnerability is CVE-2015-2370 since 03/19/2015. An attack has to be approached locally. A simple authentication is necessary for exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed by monoxgas and been published 2 months after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 84748 (MS15-076: Vulnerability in Windows Remote Procedure Call Could Allow Elevation of Privilege (3067505)), 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 91073 (Microsoft Windows Remote Procedure Call Elevation of Privilege Vulnerability (MS15-076)).

Applying the patch MS15-076 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com.

The vulnerability is also documented in the databases at Exploit-DB (37768), Tenable (84748), SecurityFocus (BID 75663†) and Vulnerability Center (SBV-51220†). The entries VDB-76461, VDB-76460, VDB-76458 and VDB-76456 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 84748
Nessus Name: MS15-076: Vulnerability in Windows Remote Procedure Call Could Allow Elevation of Privilege (3067505)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Patch: MS15-076

Timelineinfo

03/19/2015 🔍
07/14/2015 +117 days 🔍
07/14/2015 +0 days 🔍
07/14/2015 +0 days 🔍
07/15/2015 +1 days 🔍
07/15/2015 +0 days 🔍
08/13/2015 +29 days 🔍
08/13/2015 +0 days 🔍
11/28/2024 +3395 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS15-076
Researcher: monoxgas
Status: Confirmed

CVE: CVE-2015-2370 (🔍)
GCVE (CVE): GCVE-0-2015-2370
GCVE (VulDB): GCVE-100-76457

OVAL: 🔍

SecurityFocus: 75663
SecurityTracker: 1032907
Vulnerability Center: 51220 - [MS15-076] Microsoft Windows Remote Procedure Call (RPC) Privileges Escalation Vulnerability, Critical

scip Labs: https://www.scip.ch/en/?labs.20140213
See also: 🔍

Entryinfo

Created: 07/15/2015 12:46
Updated: 11/28/2024 16:54
Changes: 07/15/2015 12:46 (62), 04/07/2017 14:22 (14), 05/31/2022 13:41 (2), 05/31/2022 13:46 (1), 11/28/2024 16:54 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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