Abstract: A system and method for specification of a policy to trigger automatic signature generation, refinement, and confidence characterization is provided. The system monitors incoming payloads and identifies untrusted payloads based on specified characteristics of the process including process name, triggering action, prior actions and/or state and/or conditions. Signatures are automatically generated for untrusted payloads and stored. Additionally, the system enables denial-of-service (DoS) protection based on the number of signature-generation attempts that allows the server process to continue providing service on unaffected interfaces.

Abstract: Techniques are disclosed for verifying whether payload signatures correspond to a vulnerability or exploit. Generally a security system may be configured to detect an attack on a server while the server is processing a payload. The security system generates (or obtains) a provisional signature corresponding to the vulnerability. For example, a provisional signature may be generated for a vulnerability from a group of payloads determined to correspond to that vulnerability. The effects of subsequent payloads which match the provisional signature may be monitored. If the effects of a payload duplicate the attack symptoms, a confidence metric for provisional signature may be increased. Once the confidence metric exceeds a predetermined threshold, then the provisional signature may be made active and used to block traffic from reaching an intended destination.

Abstract: Techniques are disclosed for verifying whether payload signatures correspond to a vulnerability or exploit. Generally a security system may be configured to detect an attack on a server while the server is processing a payload. The security system generates (or obtains) a provisional signature corresponding to the vulnerability. For example, a provisional signature may be generated for a vulnerability from a group of payloads determined to correspond to that vulnerability. The effects of subsequent payloads which match the provisional signature may be monitored. If the effects of a payload duplicate the attack symptoms, a confidence metric for provisional signature may be increased. Once the confidence metric exceeds a predetermined threshold, then the provisional signature may be made active and used to block traffic from reaching an intended destination.

Abstract: A system creates a secondary stack containing execution information of at least one function operating on the computer system, and receives an attack notification of an attack on the computer system. The system determines a point in the secondary stack at which a recovery from the attack is possible. In one embodiment, the system then generates a signature of the attack based on the execution information contained within the secondary stack.

Abstract: A system creates a secondary stack containing execution information of at least one function operating on the computer system, and receives an attack notification of an attack on the computer system. The system determines a point in the secondary stack at which a recovery from the attack is possible. In one embodiment, the system then generates a signature of the attack based on the execution information contained within the secondary stack.