Microsoft SharePoint 2010/2007/3.0 XML/XLS information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Microsoft SharePoint 2010/2007/3.0 (Groupware Software). This affects an unknown part of the component XML/XLS Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Microsoft Office Groove 2007 SP2, SharePoint Workspace 2010 Gold and SP1, Office Forms Server 2007 SP2, Office SharePoint Server 2007 SP2, Office SharePoint Server 2010 Gold and SP1, Office Groove Data Bridge Server 2007 SP2, Office Groove Management Server 2007 SP2, Groove Server 2010 Gold and SP1, Windows SharePoint Services 3.0 SP2, SharePoint Foundation 2010, and Office Web Apps 2010 Gold and SP1 do not properly handle Web Parts containing XML classes referencing external entities, which allows remote authenticated users to read arbitrary files via a crafted XML and XSL file, aka "SharePoint Remote File Disclosure Vulnerability."

The weakness was presented 09/13/2011 by Nicolas Grégoire with Agarri as MS11-074 as confirmed bulletin (Technet). The advisory is shared at technet.microsoft.com. This vulnerability is uniquely identified as CVE-2011-1892 since 05/04/2011. It is possible to initiate the attack remotely. A authentication is necessary for exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

A public exploit has been developed by Nicolas Gregoire and been published 1 weeks after the advisory. The exploit is shared for download 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 56177 (MS11-074: Vulnerabilities in Microsoft SharePoint Could Allow Elevation of Privilege (2451858)), 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 110159 (Microsoft SharePoint Elevation of Privilege Vulnerability (MS11-074)).

Upgrading eliminates this vulnerability. Applying the patch MS11-074 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11531.

The vulnerability is also documented in the databases at X-Force (68840), Tenable (56177) and Exploit-DB (17873). See 4414, 58487, 58486 and 58485 for similar entries.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
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CVSSv2info

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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

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

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Nessus ID: 56177
Nessus Name: MS11-074: Vulnerabilities in Microsoft SharePoint Could Allow Elevation of Privilege (2451858)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 902625
OpenVAS Name: Microsoft SharePoint Multiple Privilege Escalation Vulnerabilities (2451858)
OpenVAS File: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Patch: MS11-074
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Timelineinfo

05/04/2011 🔍
09/13/2011 +132 days 🔍
09/13/2011 +0 days 🔍
09/13/2011 +0 days 🔍
09/13/2011 +0 days 🔍
09/14/2011 +1 days 🔍
09/15/2011 +1 days 🔍
09/16/2011 +1 days 🔍
09/20/2011 +4 days 🔍
09/20/2011 +0 days 🔍
03/19/2021 +3468 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS11-074
Researcher: Nicolas Grégoire
Organization: Agarri
Status: Confirmed

CVE: CVE-2011-1892 (🔍)
OVAL: 🔍
IAVM: 🔍

X-Force: 68840
Vulnerability Center: 33217 - [MS11-074] Microsoft Groove, SharePoint, and Office Web Apps Remote Information Disclosure, Medium
SecurityFocus: 49511 - Microsoft SharePoint XML Handling Remote File Disclosure Vulnerability
Secunia: 46008 - Microsoft SharePoint XML / XSL Processing File Disclosure Vulnerability, Less Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 09/16/2011 02:00
Updated: 03/19/2021 15:04
Changes: 09/16/2011 02:00 (87), 04/01/2017 10:25 (18), 03/19/2021 15:04 (3)
Complete: 🔍

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