Root Cause Analysis – Integer Overflows
Table of ContentsForewordIntroductionAnalyzing the Crash DataIdentifying the Cause of ExceptionPage heapInitial analysisReversing the Faulty FunctionDetermining ExploitabilityChallengesPrerequisitesHeap BasicsLookaside ListsFreelistsPreventative Security MeasuresSafe-UnlinkingHeap CookiesApplication Specific ExploitationThoughts on This AttackGeneric Exploitation MethodsLookaside List OverwriteOverviewApplication Specific TechniqueWhy Not?Brett Moore: Wrecking Freelist[0] Since 2005Freelist[0] Insert AttackOverviewApplication Specific TechniqueWhy Not?Freelist[0] Searching AttackOverviewApplication Specific TechniqueWhy Not?ConclusionRecommended Reading Foreword Over the past few years, […]
Root Cause Analysis – Memory Corruption Vulnerabilities
Introduction For the past year or so I’ve spent a significant amount of time fuzzing various applications with the hopes of identifying exploitable crashes. Early on in my research I quickly realized that building fuzzers and generating large quantities of crashes, even for heavily targeted applications, was easy. However, determining the exploitability of these crashes, […]