Huawei eSpace Meeting Service 1.0.0.23 Privilege Escalation

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Huawei Technologies eSpace Meeting Service 1.0.0.23 Local Privilege Escalation  
  
  
Vendor: Huawei Technologies Co., Ltd.  
Product web page: http://www.huawei.com  
Affected version: 1.0.0.23 (V100R001C03SPC201B050)  
  
Summary: Huawei's eSpace Meeting solution fully meets the needs of enterprise  
customers for an integrated daily collaboration system by integrating the  
conference server, conference video terminal, conference user authorization,  
and teleconference.  
  
Desc: The application is vulnerable to an elevation of privileges vulnerability  
which can be used by a simple user that can change the executable file with a  
binary of choice. The vulnerability exist due to the improper permissions, with  
the 'F' flag (full) for the 'Users' group, for the 'eMservice.exe' binary file.  
The service is installed by default to start on system boot with LocalSystem  
privileges. Attackers can replace the binary with their rootkit, and on reboot  
they get SYSTEM privileges.  
  
Tested on: Microsoft Windows 7 Professional SP1 (EN)  
  
  
Vulnerbility discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2014-5171  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5171.php  
  
Huawei ID: Huawei-SA-20140310-01  
Huawei Advisory: http://www.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-329170.htm  
  
  
  
18.01.2014  
  
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C:\>sc qc eSpaceMeeting  
[SC] QueryServiceConfig SUCCESS  
  
SERVICE_NAME: eSpaceMeeting  
TYPE : 110 WIN32_OWN_PROCESS (interactive)  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : C:\ProgramData\eSpaceMeeting\eMservice.exe  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : eSpaceMeeting  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem  
  
C:\>icacls ProgramData\eSpaceMeeting\eMservice.exe  
ProgramData\eSpaceMeeting\eMservice.exe BUILTIN\Users:(I)(F)  
NT AUTHORITY\SYSTEM:(I)(F)  
BUILTIN\Administrators:(I)(F)  
  
Successfully processed 1 files; Failed processing 0 files  
  
C:\>  
  
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