Ethical Reverse Engineering

Ethical Reverse Engineering

Where does reverse engineering fit in for the ethical hacker? Reverse engineering is often viewed as the craft of the cracker who uses her skills to remove copy protection from software or media. As a result, you might be hesitant to undertake any reverse engineering effort. The Digital Millennium Copyright Act (DMCA) is often brought up whenever reverse engineering of software is discussed. In fact, reverse engineering is addressed specifically in the anti-circumvention provisions of the DMCA. We will not debate the merits of the DMCA here, but will note that there continue to be instances in which it is wielded to prevent publication of security-related information obtained through the reverse engineering process. It is worth remembering that exploiting a buffer overflow in a network server is a bit different from cracking a digital rights management (DRM) scheme protecting an MP3 file. You can reasonably argue that the first situation steers clear of the DMCA while the second lands right in the middle of it.

When dealing with copyrighted works, two sections of the DMCA are of primary concern to the ethical hacker, addresses reverse engineering in the context of learning how to interoperate with existing software, which is not what you are after in a typical vulnerability assessment. addresses security testing and relates more closely to the ethical hacker’s mis- sion in that it becomes relevant when you are reverse engineering an access control mechanism. The essential point is that you are allowed to conduct such research as long as you have the permission of the owner of the subject system and you are acting in good faith to discover and secure potential vulnerabilities.

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