Return Address Validation Watchdog for ROP Exploit Detection

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Solution Overview

Problem

Existing security systems struggle to detect Return Oriented Programming (ROP) exploits due to their complexity and flexibility, which allows attackers to bypass traditional security defenses, including Data Execution Prevention (DEP) and code signing protections.

Innovation Solution

A system and method for detecting ROP exploits by intercepting memory attribute change functions, determining if a return address is associated with a shellcode address, and monitoring memory attribute changes during runtime to identify ROP chains before malicious shellcode execution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional security defenses (DEP, code signing) are used, then basic protection is provided, but ROP exploits can bypass them due to their complexity and flexibility

Engineering Contradiction:

Improvesecurity protectionVSAvoidexploit bypass capability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system performs preliminary actions by injecting hooks into memory attribute change functions before ROP exploits can execute. This allows the system to detect and block ROP chains at the preparation stage, preventing the exploit from establishing its malicious execution flow before it can cause harm.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary detection layer that monitors memory attribute changes without directly interfering with normal program execution. This intermediary system acts as a watchdog that observes suspicious patterns (such as return addresses pointing to non-code sections) and blocks only the malicious ROP exploits while allowing legitimate operations to proceed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If memory attribute change functions are monitored to detect ROP exploits, then detection accuracy improves, but system complexity increases

Engineering Contradiction:

ImproveROP exploit detection accuracyVSAvoidsecurity system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The detection system leverages existing system structures and functions to perform self-service monitoring. By hooking into already-present memory attribute change functions and utilizing existing process memory layouts, the system achieves sophisticated detection capabilities without requiring a completely new complex infrastructure.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system monitors changes in memory parameters (specifically memory attributes and return addresses) to detect ROP exploits. By tracking when memory sections are marked as executable and verifying that return addresses point to legitimate code sections rather than data sections, the system achieves high detection accuracy through parameter monitoring rather than complex structural analysis.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12380212B2Return address validation watchdog to discover ROP chains in exploits engineering cloud delivered security services (CDSS)

Publication Date: 2025.08.05 PALO ALTO NETWORKS INC

AI summary

The present application discloses a method, system, and computer system for detecting Return Oriented Programming (ROP) exploits. The method includes (i) intercepting, by one or more processors, a memory attribute change function for a sample; (ii) determining if a return address is associated with a shellcode address, and (iii) in response to determining that the return address is associated with the shellcode address, determining that the sample is an ROP exploit.