FB PagesCleaner

Delete Your Page Posts

Pages Unliker

Unlike All FB Pages

Handy FB Scripts

Free FB Extensions

Social Media Scripts

G+,LinkedIn & Other

WebKit JSC ObjectPatternNode appendEntry Use-After-Free

WebKit: JSC: Stack-Use-After-Free in ObjectPatternNode::appendEntry




Here's a snippet of ObjectPatternNode::appendEntry.

void appendEntry(const JSTokenLoca WebKit: JSC: Stack-Use-After-Free in ObjectPatternNode::appendEntry




Here's a snippet of ObjectPatternNode::appendEntry.

void appendEntry(const JSTokenLocation&, ExpressionNode* propertyExpression, DestructuringPatternNode* pattern, ExpressionNode* defaultValue, BindingType bindingType)
{
m_targetPatterns.append(Entry{ Identifier(), propertyExpression, false, pattern, defaultValue, bindingType });
}

Here's the definition of Entry.

struct Entry {
const Identifier& propertyName;
ExpressionNode* propertyExpression;
bool wasString;
DestructuringPatternNode* pattern;
ExpressionNode* defaultValue;
BindingType bindingType;
};

The Identifier object created by "Identifier()" is in the stack. So it will get freed in the end of the appendEntry method.

PoC:
var {[a]: b, ...[]} = {};



This bug is subject to a 90 day disclosure deadline. After 90 days elapse
or a patch has been made broadly available, the bug report will become
visible to the public.




Found by: lokihardt

Print Email

Copyright © 2016 Twitter/shreateh

How to Claim bet365 Bonus step by step.