百度卫士拒绝服务系列之一

发表于 2014年12月31日
WooYun漏洞库

漏洞概要

缺陷编号：WooYun-2014-089471

漏洞标题：百度卫士拒绝服务系列之一

漏洞详情

披露状态：

2014-12-31: 细节已通知厂商并且等待厂商处理中
2014-12-31: 厂商已经确认，细节仅向厂商公开
2015-01-03: 细节向第三方安全合作伙伴开放（绿盟科技、唐朝安全巡航、无声信息）
2015-02-24: 细节向核心白帽子及相关领域专家公开
2015-03-06: 细节向普通白帽子公开
2015-03-16: 细节向实习白帽子公开
2015-03-31: 细节向公众公开

简要描述：

看到有大牛在发百度卫士拒绝服务，于是一时兴起拿自制工具静态扫扫看，貌似挺多的噢

详细说明：

问题代码：$r19 = (com.dianxinos.optimizer.safeurl.SafeUrlLogInfo) $r18,<com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity: void c()>

}<br>
        else if(this.F == 2) {<br>
            this.G = (com.dianxinos.optimizer.safeurl.SafeUrlLogInfo)intent.getParcelableExtra("net_address_log");<br>
            this.J = intent.getParcelableArrayListExtra("alllogs");

}

else if(this.F == 2) {

this.G = (com.dianxinos.optimizer.safeurl.SafeUrlLogInfo)intent.getParcelableExtra("net_address_log");

this.J = intent.getParcelableArrayListExtra("alllogs");

com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity的c()函数中对传入的parcelable extra没有做类型校验，攻击者可以通过传入另外一个类型的parcelable实现转型异常攻击

漏洞证明：

crash trace:

E/AndroidRuntime( 5042): FATAL EXCEPTION: main<br>
E/AndroidRuntime( 5042): java.lang.RuntimeException: Unable to start activity ComponentInfo{cn.opda.a.phonoalbumshoushou/com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity}: java.lang.ClassCastException: android.app.ActivityManager$RecentTaskInfo cannot be cast to com.dianxinos.optimizer.safeurl.SafeUrlLogInfo<br>E/AndroidRuntime( 5042): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2377)<br>E/AndroidRuntime( 5042): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429)<br>E/AndroidRuntime( 5042): at android.app.ActivityThread.access$600(ActivityThread.java:171)<br>E/AndroidRuntime( 5042): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)<br>E/AndroidRuntime( 5042): at android.os.Handler.dispatchMessage(Handler.java:107)<br>E/AndroidRuntime( 5042): at android.os.Looper.loop(Looper.java:194)<br>E/AndroidRuntime( 5042): at android.app.ActivityThread.main(ActivityThread.java:5468)<br>E/AndroidRuntime( 5042): at java.lang.reflect.Method.invokeNative(Native Method)<br>E/AndroidRuntime( 5042): at java.lang.reflect.Method.invoke(Method.java:525)<br>E/AndroidRuntime( 5042): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:936)<br>E/AndroidRuntime( 5042): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)<br>E/AndroidRuntime( 5042): at dalvik.system.NativeStart.main(Native Method)<br>
E/AndroidRuntime( 5042): Caused by: java.lang.ClassCastException: android.app.ActivityManager$RecentTaskInfo cannot be cast to com.dianxinos.optimizer.safeurl.SafeUrlLogInfo<br>E/AndroidRuntime( 5042): at com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity.c(ClaimsApplyActivity.java:255)<br>E/AndroidRuntime( 5042): at com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity.onCreate(ClaimsApplyActivity.java:212)<br>E/AndroidRuntime( 5042): at android.app.Activity.performCreate(Activity.java:5211)<br>E/AndroidRuntime( 5042): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1151)<br>E/AndroidRuntime( 5042): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2341)<br>
E/AndroidRuntime( 5042): 	... 11 more

E/AndroidRuntime( 5042): FATAL EXCEPTION: main

E/AndroidRuntime( 5042): java.lang.RuntimeException: Unable to start activity ComponentInfo{cn.opda.a.phonoalbumshoushou/com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity}: java.lang.ClassCastException: android.app.ActivityManager$RecentTaskInfo cannot be cast to com.dianxinos.optimizer.safeurl.SafeUrlLogInfo E/AndroidRuntime( 5042): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2377) E/AndroidRuntime( 5042): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429) E/AndroidRuntime( 5042): at android.app.ActivityThread.access$600(ActivityThread.java:171) E/AndroidRuntime( 5042): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393) E/AndroidRuntime( 5042): at android.os.Handler.dispatchMessage(Handler.java:107) E/AndroidRuntime( 5042): at android.os.Looper.loop(Looper.java:194) E/AndroidRuntime( 5042): at android.app.ActivityThread.main(ActivityThread.java:5468) E/AndroidRuntime( 5042): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 5042): at java.lang.reflect.Method.invoke(Method.java:525) E/AndroidRuntime( 5042): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:936) E/AndroidRuntime( 5042): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703) E/AndroidRuntime( 5042): at dalvik.system.NativeStart.main(Native Method)

E/AndroidRuntime( 5042): Caused by: java.lang.ClassCastException: android.app.ActivityManager$RecentTaskInfo cannot be cast to com.dianxinos.optimizer.safeurl.SafeUrlLogInfo E/AndroidRuntime( 5042): at com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity.c(ClaimsApplyActivity.java:255) E/AndroidRuntime( 5042): at com.dianxinos.optimizer.module.paysecurity.ClaimsApplyActivity.onCreate(ClaimsApplyActivity.java:212) E/AndroidRuntime( 5042): at android.app.Activity.performCreate(Activity.java:5211) E/AndroidRuntime( 5042): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1151) E/AndroidRuntime( 5042): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2341)

E/AndroidRuntime( 5042): ... 11 more