Microsoft Edge Chakra Incorrect Jit Optimization Exploit

This is a follow-up finding that the fix for an incorrect jit optimization with TypedArray setter in Microsoft Edge Chakra may not be sufficient. Microsoft Edge: Chakra: incorrect jit optimization with TypedArray setter 2 CVE-2017-8548 I think the fix for 1045 is incorrect. Here's the original Po...

Microsoft Edge Chakra - Incorrect JIT Optimization with TypedArray Setter #2

Microsoft Edge Chakra - Incorrect JIT Optimization with TypedArray Setter 2 a0 = ; return 0; ; a0.toString; main; I just changed "var b = new Uint32Array100;" to "var b = new Uint32Array0;", and it worked well. PoC: -- 'use strict'; function funca, b, c a0 = 1.2; b0 = c; a1 = 2.2; a0 = 2.3023e-32...

Microsoft Chakra JIT Server Out-Of-Bounds Write Exploit

The Microsoft Chakra JIT server suffers from an out-of-bounds write when processing a Js::OpCode::ProfiledLoopStart opcode. Microsoft Chakra JIT server out-of-bounds write when processing Js::OpCode::ProfiledLoopStart opcode CVE-2017-8659 There is an issue in Chakra JIT server that can be...

Microsoft Chakra JIT Server IRBuilder::Build Integer Overflow Exploit

The Microsoft Chakra JIT server suffers from an integer overflow in IRBuilder::Build. Microsoft Chakra JIT server integer overflow in IRBuilder::Build CVE-2017-8637 There is an issue in Chakra JIT server that can be potentially exploited to compromise the JIT process from a compromised browser...

Microsoft Edge: Chakra: incorrect jit optimization with TypedArray setter #2(CVE-2017-8548)

I think the fix for 1045 is incorrect. Here's the original PoC. 'use strict'; function funca, b, c a0 = 1.2; b0 = c; a1 = 2.2; a0 = 2.3023e-320; function main var a = 1.1, 2.2; var b = new Uint32Array100; // force to optimize for var i = 0; i a0 = ; return 0; ; a0.toString; main; I just changed...

Microsoft Edge Scripting Engine Information Disclosure Vulnerability(CVE-2017-8659)

There is an issue in Chakra JIT server that can be potentially exploited to compromise the JIT process from a compromised browser content process. Bugs like this could potentially be used to bypass ACG Arbitrary Code Guard in Microsoft Edge. The issue has been confirmed on a ChakraCore build from...

Microsoft Edge Security Bypass Vulnerability(CVE-2017-8637)

There is an issue in Chakra JIT server that can be potentially exploited to compromise the JIT process from a compromised browser content process. Bugs like this could potentially be used to bypass ACG Arbitrary Code Guard in Microsoft Edge. The issue has been confirmed on a ChakraCore build from...

Microsoft Edge Chakra Incorrect Jit Optimization

Microsoft Edge: Chakra: incorrect jit optimization with TypedArray setter 2 CVE-2017-8548 I think the fix for 1045 is incorrect. Here's the original PoC. 'use strict'; function funca, b, c a0 = 1.2; b0 = c; a1 = 2.2; a0 = 2.3023e-320; function main var a = 1.1, 2.2; var b = new Uint32Array100; //...

Scripting Engine Security Feature Bypass Vulnerability

A security feature bypass vulnerability exists in Microsoft Edge as a result of how memory is accessed in code compiled by the Edge Just-In-Time JIT compiler that allows Arbitrary Code Guard ACG to be bypassed. By itself, this ACG bypass vulnerability does not allow arbitrary code execution...

Artificial Inteligent Packet Inspection Engine: AIEngine

AIEngine is a next generation interactive/programmable Python/Ruby/Java packet inspection engine with capabilities of learning without any human intervention, NIDS Network Intrusion Detection System functionality, DNS domain classification, network collector, network forensics and many others...

Firefox 50.0.1 - ASM.JS JIT-Spray Remote Code Execution Exploit

Exploit for windows platform in category remote exploits function asmjsmodule "use asm"; / huge jitted nop sled / function payloadcode var val = 0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val +...

Firefox 50.0.1 - ASM.JS JIT-Spray Remote Code Execution

Firefox 50.0.1 - ASM.JS JIT-Spray Remote Code Execution function asmjsmodule "use asm"; / huge jitted nop sled / function payloadcode var val = 0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val +...

Firefox 50.0.1 - ASM.JS JIT-Spray Remote Code Execution

function asmjsmodule "use asm"; / huge jitted nop sled / function payloadcode var val = 0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0...

Firefox 50.0.1 ASM.JS JIT-Spray Remote Code Execution

function asmjsmodule "use asm"; / huge jitted nop sled / function payloadcode var val = 0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0; val = val + 0xa8909090|0...

Microsoft Chakra Array JIT Optimization Type Confusion Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling o...

Microsoft Chakra Typed Array JIT Optimization Use-After-Free Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Chakra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the generation ...

WebKit JSC - JIT Optimization Check Failed in IntegerCheckCombiningPhase::handleBlock Exploit

Exploit for multiple platform in category dos / poc range.mmaxBound range.mmaxBound = data.maddend; range.mmaxOrigin = node-origin.semantic; else if data.maddend origin.semantic; ... The problem is that the check |data.maddend range.mmaxBound| is a signed comparison. PoC: -- function f let arr = ...

WebKit JSC - JIT Optimization Check Failed in IntegerCheckCombiningPhase::handleBlock

WebKit JSC - JIT Optimization Check Failed in IntegerCheckCombiningPhase::handleBlock range.mmaxBound range.mmaxBound = data.maddend; range.mmaxOrigin = node-origin.semantic; else if data.maddend origin.semantic; ... The problem is that the check |data.maddend range.mmaxBound| is a signed...

WebKit JSC - JIT Optimization Check Failed in IntegerCheckCombiningPhase::handleBlock

range.mmaxBound range.mmaxBound = data.maddend; range.mmaxOrigin = node-origin.semantic; else if data.maddend origin.semantic; ... The problem is that the check |data.maddend range.mmaxBound| is a signed comparison. PoC: -- function f let arr = new Uint32Array10; for let i = 0; i 0x100000; i++...

WebKit JSC Jit Optimization Check Failure

WebKit: JSC: JIT optimization check failed in IntegerCheckCombiningPhase::handleBlock CVE-2017-2547 When compiling Javascript code into machine code, bound checks for all accesses to a typed array are also inserted. These bound checks are re-optimized and the unnecessary checks are removed, which...