Vmware, Inc.

Chandra Sekhar Kondamuri

Abhijeet Joglekar

Abhinav Gupta

Neelima Balakrishnan

Mirko Dziadzka

Michael Granzow

Christian Willi Robert Treutler

Lingyan Huang

Narendra Kumar Vyas Pentakota

Charitha Bandi

Brian Sonnenberg

In an embodiment, a distributed firewall that learns from traffic patterns to prevent attacks is configured to receive traffic comprising one or more uniform resource identifiers (URIs), where a URI of the one or more URIs includes one or more parameters and one or more corresponding values. The firewall is configured to classify the corresponding value(s) using a pre-configured classifier and obtain a statistical rule that specifies an allowable type and an allowable length for traffic containing the one or more parameters, where the statistical rule is generated based on the classification. The firewall is configured to apply the statistical rule to incoming traffic to allow or drop requests comprising the parameter(s).

Distributed firewall that learns from traffic patterns to prevent attacks

In an embodiment, a statistical approach for augmenting signature detection in a Web application firewall includes receiving a new request including a parameter in a uniform resource identifier (URI), tokenizing the new request, and determining a compound probability that tokens in a value that is associated with the parameter of the URI and that is included in the new request are associated with an attack. The compound probability is determined based at least in part on component probabilities of tokens of historical values associated with the parameter of the URI.

Statistical approach for augmenting signature detection in web application firewall

A technique for content proxying is described. The technique includes receiving from a first device a stream of data. The stream of data is formatted in a format that does not indicate content length in a header. A received payload of the stream of data is encoded into a data chunk including a chunk length header and the received payload. The data chunk is forwarded to a second device that does not support the format.

Method and system for content proxying between formats

A method and system are disclosed. A first service engine among a plurality of service engines detects a traffic violation of a web application policy for an instantiation of a virtual service on the first service engine. The service engines maintain corresponding instances of a shared state of policy violations for the web application policy. In response to detecting the traffic violation, a first instance of the shared state on the first service engine is updated. The first service engine broadcasts the updated first instance of the shared state. Remaining service engines, which have instantiations of the virtual service, update their instances of the shared state in response to receiving the updated first instance. The instances of the shared state are aggregated to obtain an aggregated shared state. It is detected whether the aggregated shared state triggers an application policy rule for the web application policy.

Stateful distributed web application firewall

In an embodiment, a method of payload matching via a single pass transformation of an HTTP payload includes receiving a payload packet destined for a recipient and parsing the payload packet in a single scan of the packet using a combined regular expression. The combined regular expression includes a plurality of regular expressions that correspond to a set of replacement rules. The method includes determining a scatter-gather list conforming to the rule, constructing a new payload packet based on the scatter-gather list, and sending the new payload packet to the recipient.

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San Jose, CA, United States of America

Chandra Sekhar Kondamuri