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<title>Charles Muiruri</title>
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Charles Muiruri
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EXPLOIT DEVELOPMENT || I BREAK TO BUILD
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<article id="post-CVE-2017-2547" class="article article-type-post" itemscope itemprop="blogPost">
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<a href="/2018/05/29/CVE-2017-2547/" class="article-date">
<time datetime="2018-05-29T00:19:40.000Z" itemprop="datePublished">2018-05-29</time>
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<a class="article-title" href="/2018/05/29/CVE-2017-2547/">Analysis of an Out-0f-Bounds Webkit JIT bug in the Safari Browser (CVE-2017-2547)</a>
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<p>Browsers have been one of the most effective attack vectors from an offensive point of view. In most cases, a browser serves as good entry point to a chain of exploits that lead to full system compromise due to their nature of single clicks. </p>
<p>This blog post will focus on the basics of JIT Bugs and why they are critical using <b>CVE-2017-2547,a winning Pwn2Own safari bug</b>, as a case study. This specific bug is very intersting since it can be use to achieve both an info-leak and act as a write primitive.</p>
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<ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/OSX-Browser-EXploitation/">OSX/Browser EXploitation</a></li></ul>
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<article id="post-The-Vupen-Entry-Test-Part-1" class="article article-type-post" itemscope itemprop="blogPost">
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<a class="article-title" href="/2017/12/05/The-Vupen-Entry-Test-Part-1/">The Vupen Entry Test (Part 1)</a>
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<p>Sometime back while looking for challenges to do , I came a cross an article that said how big security companies give guys challenges to test their skills. As a result, I tried to find if I can find some of these challenges. I eventually bumped in to an Entry test that belongs to Vupen (whose founder went ahead to launch Zerodium). This seemed really interesting. </p>
<p>In this post we will focus on reversing, bug hunting and triggering the bug we find. There will be a follow up (Part 2 that focuses on the exploitation part). </p>
<p>Let the detective work begin 🕵️ .</p>
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<a href="/2017/12/05/The-Vupen-Entry-Test-Part-1/#more">Read More</a>
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<time datetime="2017-10-04T19:16:39.000Z" itemprop="datePublished">2017-10-04</time>
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<a class="article-title" href="/2017/10/04/Android-Hooking/">Android Hooking</a>
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<p>I recently found myself in situation where I had to analyze another process in order to understand what was really happening . In order to achieve this , I had to monitor the target process in one way or another. In the process I had to implement a simple hook just to do <strong> <em>evil stuff</em> </strong> 😈 . </p>
<p>For purposes of demonstration and for the blog I will simply look at how you can hook onto another process changing the flow of execution. In this case we will simply have a sleep program as the target and a hooking program that arguments the sleeping behavior of the sleep program .</p>
<p>Let’s get our hands dirty 😎 .</p>
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<time datetime="2017-05-17T07:48:44.000Z" itemprop="datePublished">2017-05-17</time>
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<a class="article-title" href="/2017/05/17/SIOCSIFORDER-count-out-of-bounds/">SIOCSIFORDER count memory corruption bug</a>
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<p>This post is about a bug I found in the xnu kernel affecting the <b>SIOCSIFORDER </b>call. The bug affected both OS X and iOS. In iOS it affects iOS 10.3 and below so obviously it has been fixed in the lastest version of iOS.<br>The bug id referencing the bug was <b>663014551</b>, however upon reporting I was told it was a duplicate so i guess it was a rediscovery 😒 .</p>
<p>Anyways , since it was my first bug report to apple I thought it was worth a blog post.</p>
<p>Lets begin 😃 . </p>
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<a href="/2017/05/17/SIOCSIFORDER-count-out-of-bounds/#more">Read More</a>
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<ul class="archive-list"><li class="archive-list-item"><a class="archive-list-link" href="/archives/2017/12/">December 2017</a></li><li class="archive-list-item"><a class="archive-list-link" href="/archives/2017/10/">October 2017</a></li><li class="archive-list-item"><a class="archive-list-link" href="/archives/2017/05/">May 2017</a></li></ul>
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<a href="/2017/12/05/The-Vupen-Entry-Test-Part-1/">The Vupen Entry Test (Part 1)</a>
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<a href="/2017/10/04/Android-Hooking/">Android Hooking</a>
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<a href="/2017/05/17/SIOCSIFORDER-count-out-of-bounds/">SIOCSIFORDER count memory corruption bug</a>
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© 2017 Charles Muiruri<br>
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