Microsoft Technology Licensing, LLC

Thomas P Gallagher

Andrzej Turski

Brian Thomas Carver

Matthew Bryan Jeffries

Matthew Michael Swann

David M Buchthal

Walter David Pullen

Varagur Karthikeyan Sriram Iyer

Lawrence G Landauer

Christophe Rene Loisey

Lucas Jason Forschler

Muhammed Serdar Soran

Venkataramann Renganathan

Imran Akhtar

Trace David Ferrier

Implementations described herein disclose a system for providing personalized threat protection for users of computer applications. An implementation of a method disclosed herein includes analyzing usage pattern of an application by a client to determine various application functionalities used by the client, identifying security threats related to the various application functionalities used by the client, and changing the configuration settings of the application for the client based on the plurality of security threats.

Personalized threat protection

A canary value is used to validate a message from a non-web browser client application to a web server providing web services to mitigate cross-site forgery attacks. The canary value is generated by the server in party by applying a hash function to a user identifier and a time stamp. The server provides the canary value to the client application in response to receiving a message that does not have a canary or has an expired canary. The client application upon receiving an error message with a canary message will resend the prior message with the canary value present. The client application caches the canary value for subsequent messages until a new canary value is received. The canary value allows the server to ignore messages generated by the client application under control of an attacker.

Dynamic cross-site request forgery protection in a web-based client application

Controls of interest are indentified by determining which installed software objects associated with the application of interest exhibit certain characteristics, such as being publicly creatable, being designated as safe, and providing a security-related interface. Once the controls of interest are identified from the installed software objects, information associated with each control is obtained and stored. Each time the software program of interest is modified and re-installed, the information is updated to reflect the modifications. Additional information is also stored with the information. The information and the additional information may be provided to a browser for display and may be modified by a user to describe a present state associated with the control of interest (i.e., tested, untested).

System and method for identifying potential security risks in controls

An automated method and system for testing a web site for vulnerability to a cross site scripting (XSS) attack are disclosed. The automated tool injects a tracer value into both GET and POST form data, and monitors the resultant HTML to determine whether the tracer value is returned to the local machine by the server to which it was sent. If the tracer value is returned, the automated tool attempts to exploit the web site by injecting a non-malicious script as part of an input value for some form data, based on the location in the returned HTML in which the returned tracer value was found. If the exploit is successful, as indicated by the non-malicious script, the automated tool logs the exploit to a log file that a user can review at a later time, e.g., to assist in debugging the web site.

Automated detection of cross site scripting vulnerabilities

A method and system are provided for filtering harmful HTML content from an electronic document. An application program interface (API) examines the fundamental structure of the HTML content in the document. The HTML content in the electronic document is parsed into HTML elements and attributes by a tokenizer and compared to a content library by a filter in the API. The filter removes unknown HTML content as well as known content that is listed as harmful in the content library. After the harmful HTML content has removed, a new document is encoded which includes the remaining safe HTML content for viewing in a web browser.

Method, system, and computer-readable medium for filtering harmful HTML in an electronic document

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Redmond, WA, United States of America

Thomas P Gallagher