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domnom_opera_unknown_sigill.html
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<!--
******************************************************************************
* domnom.js browser fuzzer by @chaseahiggins, loudeating23
******************************************************************************
* domnom is a simple javascript fuzzer that tries to find bugs by choosing
* parent/child combinations of various depths using several different
* techniques to reference the children. the goal is to find invalid access
* issues, uafs, null ptr deref etc
* inspired by lcamtuf's ref_fuzz, with some sauces for new ES6 stuff
* https://lcamtuf.blogspot.com/2010/06/announcing-reffuzz-2yo-fuzzer.html
******************************************************************************
* BUGS/TODO:
* maybe move logging to webworker to keep main thread free to fuzz
* 'arg builder' that builds random functions objs etc in a semi-intelligent
* way that is likely to cause problems (mostly with arraybuff resizing)
* NaNs and nulls getting through number while for arr len edit
* violation of cors causes script to stop if accessed locally via file://
* newEl() should be able to choose random test_area children as parents too
* maybe move all fun vals to an iterable obj
* ie11 needs work, should probably keep it supported(maybe url mode opt?)
* childnodes count growing too quickly
* childnodes unreliable, keep el count ref somewhere, inc on newEl, dec on
* removel
******************************************************************************
-->
<html>
<head>
<title>domnom.js by @chaseahiggins</title>
<link href="https://fonts.googleapis.com/css?family=Space+Mono:400,700" rel="stylesheet">
<style>
* {
margin: 0;
padding: 0;
}
html, body {
font-family: 'Space Mono', monospace;
font-size: 18px;
background-color: #222;
color: #ddd;
}
#fuzzing {
margin: 0 1em;
}
a, a.link, a.visited {
color: red;
text-decoration: none;
}
#log {
margin: 0.5em 0 1em 0;
}
#log div {
border: 1px solid #111;
background-color: #333;
height: 40%;
width: 50%;
padding: 5px;
font-size: 14px;
overflow-y: scroll;
}
#log::-webkit-scrollbar-track {
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
}
#log::-webkit-scrollbar-thumb {
background-color: darkgrey;
outline: 1px solid slategrey;
}
#test_area {
border: 1px solid #111;
background-color: #333;
height: 33%;
width: 33%;
font-size: 14px;
}
</style>
<!--[if IE]>
<style>
#log div {
height: 500px;
}
</style>
<![endif]-->
<script>
var domnom = domnom || {};
// options
domnom.opts = {
odds: 5, // how random should we be
max_log: 16384, // 16k
max_els: 10, // can get out of hand quickly
func_argc: 7, // max number of args for func calls
max_bad_els: 10, // max num of bad accesses to tolerate
max_depth: 10, // max trips into objects when reading
max_type_misses: 10 // max misses on type preservation
};
// runtime values
domnom.run = {};
// elements, properties, attributes etc
// fun values for things
domnom.fun_vals = [
Infinity,
-Infinity,
undefined,
null,
false,
true,
eval,
-1,
navigator,
new Array,
0.1333333333333337,
0x13371337,
7e7,
-7e7,
7e-7,
1e101,
-1e101,
"aqua"
];
// functions that have a history of being problematic, mostly new stuff from es6
// these functions come from bug reports on p0, and other disclosed browser errs
domnom.fun_objs = [
Object,
JSON,
Array,
DataView,
ArrayBuffer,
Uint8ClampedArray
];
// html
domnom.html = {};
domnom.html.tags = [
"div", "p", "img", "object", "video",
"audio", "br", "canvas", "svg", "link",
"span", "figcaption", "time", "meta", "embed",
"textarea", "iframe", "nav", "area", "fieldset",
"applet", "html", "a", "bdi", "keygen",
"noframes", "progress", "sup", "table", "wbr",
"cron", "marquee", "aside"
];
domnom.html.attributes =[
"tabindex"
//"aria-*"
];
// css
domnom.css = {};
domnom.css.properties = [
"border-top"
];
// js
domnom.js = {};
domnom.js.bad_props = {
// avoid these to prevent mangling the dom, from lcamtuf's ref_fuzz
"parentNode" : 1,
"nextSibling" : 1,
"previousSibling" : 1,
"top" : 1,
"parent" : 1,
"opener" : 1,
"ownerDocument" : 1,
"parentElement" : 1,
"parentTextEdit" : 1,
"offsetParent" : 1,
"DOCUMENT_POSITION_PRECEDING" : 1,
"document" : 1,
"activeElement" : 1,
"documentElement" : 1,
"onbeforeunload" : 1
};
// the things
domnom.util = {};
domnom.util.heapSpray = function() {
// at start of tests, after every round, and whenever you're just feeling like it
// this is essentially from lcamtuf's ref_fuzz
// we'll start with 32MB(22) spray given how much memory most machines now have
// instead of the 16MB(21) spray used in ref_fuzz
var spray_str = "ABCDABCD";
for (var i = 0; i < 22; i++) // you end up spraying spray_str.length * (2 ^ loop_count) bytes
spray_str += spray_str;
return 1;
};
domnom.util.log = function(msg) {
setTimeout(function() { // keep this channel clear
if (domnom.run.log.innerHTML.length > domnom.opts.max_log) // big one...
domnom.run.log.innerHTML = domnom.run.log.innerHTML.slice(domnom.run.log.innerHTML.length - domnom.opts.max_log);
domnom.run.log.innerHTML += msg + "<br />";
domnom.run.log.scrollTop = domnom.run.log.scrollHeight; // scroll on add
}, 0);
}; // end domnom.util.log()
domnom.util.rand = function(mod) {
return Math.floor(Math.random() * mod);
}; // end rand()
domnom.util.addRef = function(obj, origin) {
// we need to store refs if we're ever going to confusulate them
// potentially, we make a decision here as to whether it's worth our time to store it
// let's add the reference
//domnom.util.log("storing ref: " + obj + "; origin: " + origin + "; round: " + domnom.run.round + "; ref#: " + domnom.run.ref_stack.length);
// parsh it
domnom.run.ref_stack.push(obj);
}; // end addref()
domnom.util.readObj = function(obj, prop) {
// see if we can read this object
prop = prop || 0;
var val;
try {
if (prop) {
val = obj[prop];
//domnom.util.log(prop + ": " + val + "; type: " + typeof(val));
} else {
val = obj;
}
} catch(e) {
return false;
}
return {
val: val,
type: typeof(val)
}
}; // end readObj()
domnom.util.setObj = function(obj, prop, type) {
// set the property of this object
// this is where the magic happens basically, where we
// try and pick the craziest shit possible to ref
var val;
switch (domnom.util.rand(3)) {
case 0: // do a fun_val
val = domnom.fun_vals[domnom.util.rand(domnom.fun_vals.length)];
break;
case 1: // pick from the ref stack
val = domnom.run.ref_stack[domnom.util.rand(domnom.run.ref_stack.length)];
break;
case 2: // pick random property from a fun_objs
val = domnom.fun_objs[domnom.util.rand(domnom.fun_objs.length)];
var props = Object.getOwnPropertyNames(val);
val = val[props[domnom.util.rand(props.length)]];
break;
case 3: // we just found a new home for a function
break;
} // end switch
if (type && typeof(val) !== type && domnom.run.type_misses < domnom.opts.max_type_misses) {
domnom.run.type_misses++;
return domnom.util.setObj(obj, prop, type); // try again, yeah it's lazy
} else if (type && typeof(val) === type) domnom.run.type_misses = 0; // reset it
try {
obj[prop] = val;
} catch(e) {
//domnom.util.log("could not change property: " + prop);
}
}; // end setObj()
domnom.util.walkObj = function(obj, origin) {
// let's review this object's properties and potentially store refs
var prop;
for (prop in obj) {
var val;
val = domnom.util.readObj(obj, prop);
if (!val) continue; // skip a bad prop
val = val.val; // maybe we'll make the obj not redundant at somme point
// store a ref maybe, we'll have a few cases where no
if (typeof(val) === "string" && domnom.util.rand(domnom.opts.odds) !== 0)
continue; // strangs can be so boring, advice from ref_fuzz
// maybe case it to *sometimes* allow a fuction ref
if (val != null && typeof(val) != "function" && domnom.js.bad_props[prop] != 1)
domnom.util.addRef(val, origin + '.' + prop);
} // finished with props
}; // end walkObj()
domnom.util.callFunctions = function(obj, origin) {
// try and walk a potentially freed obj and call functions
var prop;
var rets = [];
for (prop in obj) {
var val;
val = domnom.util.readObj(obj, prop);
if (!val) continue; // skip a bad prop
val = val.val;
// see if we should keep looking at this one
if (typeof(val) != "function") continue;
// see if we can call it
try {
// build a dummy param list
// js gives us flexibility to do too many args
// do a dumb arg builder for now
var argc = domnom.util.rand(domnom.opts.func_argc);
var args = [];
for (var i = 0; i < argc; i++)
args.push(domnom.run.ref_stack[domnom.util.rand(domnom.run.ref_stack.length)]);
// call it
var ret = val.apply(obj, args);
//domnom.util.log(prop + " function returned: " + ret);
// let's pop it in the rets stack
/*
if (domnom.util.rand(domnom.opts.odds) % 2 == 0 && typeof(ret) == "object") {
// maybe change odds later, remove mod. might also allow other types in
domnom.util.addRef(ret, "funcreturn");
}
*/
rets.push(ret);
} catch(e) {
//domnom.util.log("couldn't call " + prop + ": " + e);
}
// if we get a valid return val, save that ref
}
return rets;
}; // end callFunctions()
domnom.util.objThrasher = function(obj, origin) {
// let's go through and fuckulate some stuff
// again we step through props
var prop;
for (prop in obj) {
// first, we know we can skip the blacklist props
// also skip a null prop etc, or just randomly
if (!prop || domnom.js.bad_props[prop] == 1) continue; // could be combined
if (domnom.util.rand(domnom.opts.odds) === 0) continue; // were already long
if (prop == "length" || Array.isArray(obj[prop])) { // we specifically want to try and mess with this one
var fval;
do {
fval = domnom.fun_vals[domnom.util.rand(domnom.fun_vals.length)];
}
while (isNaN(fval));
if (Math.abs(fval) > 0x10000) fval %= domnom.util.rand(0x10000); // was causing too many large allocs
try {
(prop == "length") ? obj[prop] = fval : obj[prop].length = fval;
} catch (e) {
console.log("can't set len: " + fval);
console.log(e);
}
continue;
}
var val;
val = domnom.util.readObj(obj, prop);
if (!val) continue; // skip a bad prop
val = val.val;
// decide if we want to delete the prop or change it
if (domnom.util.rand(domnom.opts.odds) === 0) {
// 1/odds chance, and we hit it. delete the prop
try {
//domnom.util.log("deleting propery: " + prop);
delete obj[prop];
} catch (e) {
//domnom.util.log("could not delete property: " + prop);
}
}
else {
// let's just change it to something fun
//domnom.util.log("changing property: " + prop);
if (domnom.util.rand(domnom.opts.odds) % 2 == 0) // preserve prop type
domnom.util.setObj(obj, prop, typeof(obj[prop]));
else
domnom.util.setObj(obj, prop, null); // just let it go crazy
}
} // end prop walk
}; // end objThrasher()
domnom.util.newElement = function() {
// add a new element to testing tree
try {
// picks a random el from the list of allowed tags at domnom.html.tags
var tag = document.createElement(domnom.html.tags[domnom.util.rand(domnom.html.tags.length)]);
// pop it into the missile range
if (domnom.util.rand(domnom.opts.odds) == 0) { // pick a rand child as parent
var r = domnom.util.rand(domnom.opts.max_els);
console.log('opting to attach to random child: ' + r);
domnom.run.test_area.childNodes[r].appendChild(tag);
}
else // just add to root
domnom.run.test_area.appendChild(tag);
// add to the current list of target tags
//domnom.run.curr_tags.push(tag);
// make it have stuff
tag.innerHTML = "One count of being a bear.<br />And one count of being an accessory to being a bear.";
tag.value = "stonecutters";
} catch(e) {
// we had a problem
console.log("couldn't create a new tag: " + e);
domnom.util.log("couldn't create a new tag: " + e);
return false;
}
// return the new tag for if caller wants to verify what was added
return tag;
}; // end newElement()
domnom.util.reload = function() {
//alert("reloading!"); // block to pause reload
location.reload(true);
}; // end reload()
// the testing
domnom.init = function() {
// setup
domnom.run.log = document.getElementById("log").getElementsByTagName("div")[0]; // log div, but why?
domnom.run.log.innerHTML = "";
domnom.util.log("domnom.js - loudeating");
domnom.util.log("initializing fuzzer...");
domnom.run.test_area = document.getElementById("test_area"); // tests div
domnom.run.test_area.innerHTML = "";
domnom.run.ref_stack = []; // a place for references™
domnom.run.round = 0; // round count for our references
domnom.run.bad_els = 0; // count of unremovable dom els
domnom.run.type_misses = 0; // maximum number of times to retry type perservation
// fill the heap up a little
domnom.util.heapSpray();
// let's go
domnom.util.log("let's get started :)");
domnom.next();
}; // end domnom.init()
domnom.next = function() {
// time do do something
// depending on our fuzzing state, we might want to add, test or destroy refs
// we might also try various other strategies to fuckulate the dom
domnom.run.curr_tags = domnom.run.test_area.childNodes.length;
if ((domnom.util.rand(domnom.opts.odds) === 0 && domnom.run.curr_tags < domnom.opts.max_els) || domnom.run.ref_stack.length === 0) { // add one
var el = domnom.util.newElement(); // easy to add, VERY expensive to work with
// store refs
domnom.util.walkObj(el, "origin");
}
// choose an element in the list to mess with
if (domnom.run.curr_tags > 0) {
var r = domnom.util.rand(domnom.run.curr_tags);
var el = domnom.run.test_area.childNodes[r];
domnom.util.objThrasher(el, "something");
}
// call some funcs, it's a farty afterall
if (domnom.run.curr_tags > 0) {
var new_refs = [];
var r = domnom.util.rand(domnom.run.curr_tags);
var el = domnom.run.test_area.childNodes[r];
//domnom.util.callFunctions(el, "somewhere");
for (var i = 0; i < domnom.opts.max_depth; i++) {
var rets = domnom.util.callFunctions(el, "somewhere");
rets.map(function(ret) {
if (ret) new_refs.push(ret);
});
}
domnom.run.ref_stack = domnom.run.ref_stack.concat(new_refs);
}
// while we're calling funcs, let's pick some from the refs stack too
// maybe delete one I do what I want
if (domnom.util.rand(domnom.opts.odds) === 0) {
// delete's job is also to check if too many bad els exist
if (domnom.run.bad_els > domnom.opts.max_bad_els)
domnom.util.reload();
try {
var r = domnom.util.rand(domnom.run.curr_tags);
// peel off the dom
domnom.run.test_area.removeChild(domnom.run.test_area.childNodes[r]);
delete domnom.run.test_area.childNodes[r];
} catch (e) {
domnom.run.bad_els++;
domnom.util.log("could not remove element: " + e);
}
}
// let's get ready for the next round
//if (domnom.run.round > 50) return;
// inc round count
//console.log("end round: " + domnom.run.round);
domnom.run.round++;
domnom.util.heapSpray();
// here goes nothing..
//domnom.next();
setTimeout(function() {
domnom.next();
}, 0);
}; // end domnom.next()
</script>
</head>
<body onload="domnom.init();">
<div id="fuzzing">
<span style="border-bottom: 1px solid red;">
<span style="font-size: 2em;">domnom.js</span> by <a href="https://twitter.com/chaseahiggins">@chaseahiggins</a>
</span>
<div id="log">
log:<br />
<div>
</div>
</div>
<!-- test area -->
missile range:
<div id="test_area">
</div>
</div>
</body>
</html>