fuzzilli

Fuzzilli A coverage-guided fuzzer for dynamic language interpreters based on a custom intermediate language "FuzzIL" which can be mutated and translated to JavaScript. Usage The basic steps to use this fuzzer are: 1. Download the source code for one of the supported JavaScript engines. See the...

fuzzilli

Fuzzilli Un fuzzer guidé par la couverture de code pour les interpréteurs de langages dynamiques basé sur un langage intermédiaire personnalisé "FuzzIL" qui peut être muté et traduit en JavaScript. Utilisation Les étapes de base pour utiliser ce fuzzer sont : 1. Télécharger le code source de l'un...

PT-2025-25452 · Undefined · Undefined

CVE-2025-46168 JSTargetFuzzer-V2 JSTargetFuzzer-v2.0 is a fuzzing approach that incorporates novel history-based guidance, using tailored seeds and custom mutation operators. It is built on top of the Fuzzilli fra... https://t.co/ioVUFu93Dp...

Announcing the Fuzzilli Research Grant Program

Posted by Samuel Groß, Project Zero Project Zero’s mission is to make 0-day hard in order to improve end-user security. We attack this problem in different ways, including supporting other security researchers. While Google currently offers research grants, they are limited to academics and those...

JSC DFG ObjectAllocationSinkingPhase Crash

JSC: DFG: ObjectAllocationSinkingPhase leaves data flow graph inconsistent While fuzzing JavaScriptCore with fuzzilli, I encountered the following simplified and commented JavaScript program which crashes jsc from current HEAD and the stable release: function v9 const v14 = ; const v15 = a: 42;...

JSC Argument Object Reconstruction Type Confusion

JSC: Type confusion during bailout when reconstructing arguments objects The following sample was found by Fuzzilli and then slightly modified. It crashes JSC in debug builds: function main const v2 = 1337,1337; const v3 = 1337,v2,v2,0; Object.proto = v3; for let v10 = 0; v10...

JavaScriptCore - GetterSetter Type Confusion During DFG Compilation Exploit

The following JavaScript program, found by Fuzzilli and slightly modified, crashes JavaScriptCore built from HEAD and the current stable release /System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc: let notAGetterSetter = whatever: 42; function v2v5 const v10 = Object; if v5 const v1...