CVE Vulnerabilities

CVE-2011-1892

Exposure of Sensitive Information to an Unauthorized Actor

Published: Sep 15, 2011 | Modified: Oct 12, 2018
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
4 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu

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.

Weakness

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected Software

Name Vendor Start Version End Version
Forms_server Microsoft 2007-sp2 (including) 2007-sp2 (including)
Groove Microsoft 2007-sp2 (including) 2007-sp2 (including)
Groove_data_bridge_server Microsoft 2007-sp2 (including) 2007-sp2 (including)
Groove_management_server Microsoft 2007-sp2 (including) 2007-sp2 (including)
Groove_server Microsoft 2010 (including) 2010 (including)
Groove_server Microsoft 2010-sp1 (including) 2010-sp1 (including)
Office_web_apps Microsoft 2010 (including) 2010 (including)
Office_web_apps Microsoft 2010-sp1 (including) 2010-sp1 (including)
Sharepoint_foundation Microsoft 2010 (including) 2010 (including)
Sharepoint_server Microsoft 2007-sp2 (including) 2007-sp2 (including)
Sharepoint_server Microsoft 2010 (including) 2010 (including)
Sharepoint_server Microsoft 2010-sp1 (including) 2010-sp1 (including)
Sharepoint_services Microsoft 3.0-sp2 (including) 3.0-sp2 (including)
Sharepoint_workspace Microsoft 2010 (including) 2010 (including)
Sharepoint_workspace Microsoft 2010-sp1 (including) 2010-sp1 (including)

Extended Description

There are many different kinds of mistakes that introduce information exposures. The severity of the error can range widely, depending on the context in which the product operates, the type of sensitive information that is revealed, and the benefits it may provide to an attacker. Some kinds of sensitive information include:

Information might be sensitive to different parties, each of which may have their own expectations for whether the information should be protected. These parties include:

Information exposures can occur in different ways:

It is common practice to describe any loss of confidentiality as an “information exposure,” but this can lead to overuse of CWE-200 in CWE mapping. From the CWE perspective, loss of confidentiality is a technical impact that can arise from dozens of different weaknesses, such as insecure file permissions or out-of-bounds read. CWE-200 and its lower-level descendants are intended to cover the mistakes that occur in behaviors that explicitly manage, store, transfer, or cleanse sensitive information.

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References