Microsoft Office Remote Code Execution Vulnerabilities

Last Update Date: 14 Oct 2015 10:21 Release Date: 14 Oct 2015 3210 Views

RISK: High Risk

TYPE: Operating Systems - Windows OS

Multiple Microsoft Office Memory Corruption Vulnerabilities
Remote code execution vulnerabilities exist in Microsoft Office software when the Office software fails to properly handle objects in memory. An attacker who successfully exploited these vulnerabilities could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Microsoft SharePoint Information Disclosure Vulnerability
An information disclosure vulnerability exists when SharePoint InfoPath Forms Services improperly parses the Document Type Definition (DTD) of an XML file. An attacker who successfully exploited the vulnerability could browse the contents of arbitrary files on a SharePoint server. An attacker must have write permissions to a site and InfoPath Services must be enabled to exploit the vulnerability.
Microsoft Office Web Apps XSS Spoofing Vulnerability
A spoofing vulnerability exists when an Office Web Apps Server does not properly sanitize a specially crafted request. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected Office Web Apps Server. The attacker who successfully exploited this vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the Office Web App site on behalf of the victim, such as change permissions, delete content, steal sensitive information (such as browser cookies) and inject malicious content in the browser of the victim.
Microsoft SharePoint Security Feature Bypass Vulnerability
A security feature bypass vulnerability exists in Microsoft SharePoint. The vulnerability is caused when Office Marketplace is allowed to inject JavaScript code that persists onto a SharePoint page, because SharePoint does not enforce the appropriate permission level for an application or user. An attacker who successfully exploited this vulnerability could perform persistent cross-site scripting attacks and run script (in the security context of the logged-on user) with malicious content that appears authentic. This could allow the attacker to steal sensitive information, including authentication cookies and recently submitted data.