Breaking Isolation: A New Perspective on Hypervisor Exploitation via Cross-Domain Attacks

2025-12-03

AI Summary

Modern virtualized environments suffer from weak memory isolation, enabling attackers to exploit guest-memory manipulation vulnerabilities to corrupt host-side pointers. However, existing exploitation frameworks are hindered by the absence of paravirtualization interfaces and interference from ASLR, limiting their effectiveness. This paper introduces Cross-Domain Attack (CDA), a novel exploitation paradigm. We systematically establish the first CDA taxonomy and automated exploitation framework, leveraging guest memory reuse to circumvent reliance on complex host data structures. Our approach integrates cross-domain gadget identification, tainted pointer matching, trigger-input generation, and exploit-chain auto-assembly, combining dynamic analysis with symbolic execution for end-to-end attack-chain construction. Evaluated on 15 real-world vulnerabilities across QEMU and VirtualBox, our framework achieves stable VM escape in all cases, demonstrating strong generality and practicality.

Technology Category

• Application Domains: Security
• Computer Vision: Adversarial Attacks & Robustness
• Cognitive Modeling & Cognitive Systems: (Computational) Cognitive Architectures

Application Category

• Systems and Infrastructure for Web, Mobile and WoT: Virtualization and resource management in Web systems and infrastructures
• Search and Retrieval-Augmented AI: Vertical and domain-specific search
• Responsible Web: Data and user privacy-enhancing technologies for the Web

Abstract

Hypervisors are under threat by critical memory safety vulnerabilities, with pointer corruption being one of the most prevalent and severe forms. Existing exploitation frameworks depend on identifying highly-constrained structures in the host machine and accurately determining their runtime addresses, which is ineffective in hypervisor environments where such structures are rare and further obfuscated by Address Space Layout Randomization (ASLR). We instead observe that modern virtualization environments exhibit weak memory isolation -- guest memory is fully attacker-controlled yet accessible from the host, providing a reliable primitive for exploitation. Based on this observation, we present the first systematic characterization and taxonomy of Cross-Domain Attacks (CDA), a class of exploitation techniques that enable capability escalation through guest memory reuse. To automate this process, we develop a system that identifies cross-domain gadgets, matches them with corrupted pointers, synthesizes triggering inputs, and assembles complete exploit chains. Our evaluation on 15 real-world vulnerabilities across QEMU and VirtualBox shows that CDA is widely applicable and effective.

Problem

• Addresses hypervisor memory safety vulnerabilities via cross-domain attacks.
• Overcomes ASLR limitations by exploiting weak memory isolation in virtualization.
• Automates exploit chain generation for guest-to-host capability escalation.

Innovation

• Exploits weak memory isolation between guest and host
• Automates cross-domain gadget identification and exploit synthesis
• Systematically characterizes cross-domain attacks for hypervisor exploitation