ShrinkWrap: VTable Protection without Loose Ends

I. Haller, Enes Göktas, E. Athanasopoulos, G. Portokalidis, H. Bos
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引用次数: 57

Abstract

As VTable hijacking becomes the primary mode of exploitation against modern browsers, protecting said VTables has recently become a prime research interest. While multiple source- and binary-based solutions for protecting VTables have been proposed already, we found that in practice they are too conservative, which allows determined attackers to circumvent them. In this paper we delve into the design of C++ VTables and match that knowledge against the now industry standard protection scheme of VTV. We propose an end-to-end design that significantly refines VTV, to offer a provably optimal protection scheme. As we build on top of VTV, we preserve all of its advantages in terms of software compatibility and overhead. Thus, our proposed design comes "for free" for any user today. Besides the design we propose a testing methodology, which can be used by future developers to validate their implementations. We evaluated our protection scheme on Google Chrome and show that no compatibility issues were introduced, while overhead is also unchanged compared to the baseline of VTV.
ShrinkWrap:无松动的VTable保护
随着虚拟表劫持成为攻击现代浏览器的主要方式,保护虚拟表最近成为一个主要的研究兴趣。虽然已经提出了用于保护vtable的多个基于源代码和二进制的解决方案,但我们发现在实践中它们过于保守,这使得有决心的攻击者可以绕过它们。本文对c++ VTables的设计进行了深入的研究,并将这些知识与目前行业标准的VTV保护方案进行了比较。我们提出了一个端到端设计,显着改进VTV,以提供可证明的最佳保护方案。当我们在VTV之上构建时,我们保留了它在软件兼容性和开销方面的所有优势。因此,我们提出的设计对今天的任何用户都是“免费的”。除了设计之外,我们还提出了一种测试方法,可供未来的开发人员用来验证他们的实现。我们在Google Chrome上评估了我们的保护方案,并显示没有引入兼容性问题,而开销与VTV的基线相比也没有变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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