ExploitFixes
RealNetworks RealGames StubbyUtil.ProcessMgr.1 ActiveX Control Multiple Remote Command Execution 2011-04-03 16:15:22

RealNetworks RealGames StubbyUtil.ProcessMgr.1 ActiveX Control
(InstallerDlg.dll v2.6.0.445) Multiple Remote Commands Execution
Vulnerabilities

tested against Internet Explorer 9, Vista sp2

download url: http://www.gamehouse.com/

background:

When choosing to play with theese online games ex. the game called
"My Farm Life" (see url: http://www.gamehouse.com/download-games/my-farm-life )
you download an installer called GameHouse-Installer_am-myfarmlife_gamehouse_.exe

This setup program installs an ActiveX with the following settings:

CLSID: {5818813E-D53D-47A5-ABBB-37E2A07056B5}
Progid: StubbyUtil.ProcessMgr.1
Binary Path: C:\Program Files\RealArcade\Installer\bin\InstallerDlg.dll
Safe For Initialization (Registry): True
Safe For Scripting (Registry): True

This control is safe for scripting and safe for initialization,
so Internet Explorer will allow scripting of this control from
remote.

vulnerability:

This control has four methods implemented insecurely:

CreateVistaTaskLow() -> allows to launch arbitrary commands
Exec() -> allows to launch arbitrary commands
ExecLow() -> allows to launch arbitrary commands
ShellExec() -> allows to launch arbitrary executables

other attacks are possible ,
see typelib:

class IProcessMgr { /* GUID={860450DB-79C1-44E4-96E0-C89144E4B444} */
/* DISPID=1610612736 */
function QueryInterface(
/* VT_PTR [26] [in] --> ? [29] */ &$riid,
/* VT_PTR [26] [out] --> VT_PTR [26] */ &$ppvObj
)
{
}
/* DISPID=1610612737 */
/* VT_UI4 [19] */
function AddRef(
)
{
}
/* DISPID=1610612738 */
/* VT_UI4 [19] */
function Release(
)
{
}
/* DISPID=1610678272 */
function GetTypeInfoCount(
/* VT_PTR [26] [out] --> VT_UINT [23] */ &$pctinfo
)
{
}
/* DISPID=1610678273 */
function GetTypeInfo(
/* VT_UINT [23] [in] */ $itinfo,
/* VT_UI4 [19] [in] */ $lcid,
/* VT_PTR [26] [out] --> VT_PTR [26] */ &$pptinfo
)
{
}
/* DISPID=1610678274 */
function GetIDsOfNames(
/* VT_PTR [26] [in] --> ? [29] */ &$riid,
/* VT_PTR [26] [in] --> VT_PTR [26] */ &$rgszNames,
/* VT_UINT [23] [in] */ $cNames,
/* VT_UI4 [19] [in] */ $lcid,
/* VT_PTR [26] [out] --> VT_I4 [3] */ &$rgdispid
)
{
}
/* DISPID=1610678275 */
function Invoke(
/* VT_I4 [3] [in] */ $dispidMember,
/* VT_PTR [26] [in] --> ? [29] */ &$riid,
/* VT_UI4 [19] [in] */ $lcid,
/* VT_UI2 [18] [in] */ $wFlags,
/* VT_PTR [26] [in] --> ? [29] */ &$pdispparams,
/* VT_PTR [26] [out] --> VT_VARIANT [12] */ &$pvarResult,
/* VT_PTR [26] [out] --> ? [29] */ &$pexcepinfo,
/* VT_PTR [26] [out] --> VT_UINT [23] */ &$puArgErr
)
{
}
/* DISPID=1 */
/* VT_BOOL [11] */
function Exec(
/* VT_PTR [26] [in] --> VT_BSTR [8] */ &$mod,
/* VT_PTR [26] [in] --> VT_BSTR [8] */ &$cmdline,
/* VT_BOOL [11] [in] */ $__MIDL_0097,
/* VT_BOOL [11] [in] */ $__MIDL_0098,
/* VT_PTR [26] [in] --> VT_BSTR [8] */ &$__MIDL_0099
)
{
/* method Exec */
}
/* DISPID=2 */
/* VT_BOOL [11] */
function IsFinished(
)
{
}
/* DISPID=3 */
/* VT_UI4 [19] */
function CreateNamedMutex(
/* VT_BSTR [8] [in] */ $__MIDL_0102
)
{
}
/* DISPID=4 */
function ReleaseMutex(
/* VT_UI4 [19] [in] */ $__MIDL_0104
)
{
}
/* DISPID=5 */
function CloseMutex(
/* VT_UI4 [19] [in] */ $__MIDL_0105
)
{
}
/* DISPID=6 */
/* VT_BOOL [11] */
function ObtainMutex(
/* VT_UI4 [19] [in] */ $__MIDL_0106
)
{
}
/* DISPID=7 */
/* VT_BOOL [11] */
function WaitOnMutex(
/* VT_UI4 [19] [in] */ $__MIDL_0108,
/* VT_INT [22] [in] */ $__MIDL_0109
)
{
}
/* DISPID=8 */
function CloseEvent(
/* VT_UI4 [19] [in] */ $__MIDL_0111
)
{
}
/* DISPID=9 */
function FireEvent(
/* VT_UI4 [19] [in] */ $__MIDL_0112
)
{
}
/* DISPID=10 */
/* VT_UI4 [19] */
function CreateNamedEvent(
/* VT_BSTR [8] [in] */ $__MIDL_0113
)
{
}
/* DISPID=11 */
/* VT_UI4 [19] */
function ExitCode(
)
{
}
/* DISPID=12 */
function CreateVistaTaskLow(
/* VT_BSTR [8] [in] */ $bstrExecutablePath,
/* VT_BSTR [8] [in] */ $bstrArguments,
/* VT_BSTR [8] [in] */ $workDir
)
{
}
/* DISPID=13 */
/* VT_BOOL [11] */
function ExecLow(
/* VT_BSTR [8] [in] */ $__MIDL_0116,
/* VT_BSTR [8] [in] */ $cmdline,
/* VT_PTR [26] [in] --> VT_BSTR [8] */ &$workDir
)
{
}
/* DISPID=14 */
function ShellExec(
/* VT_BSTR [8] [in] */ $__MIDL_0117
)
{
}
/* DISPID=15 */
function Sleep(
/* VT_UI4 [19] [in] */ $__MIDL_0118
)
{
}
}


binary info:
>lm -vm
Image path: C:\Program Files\RealArcade\Installer\bin\InstallerDlg.dll
Image name: InstallerDlg.dll
Timestamp: Mon Mar 14 14:22:44 2011 (4D7E6B04)
CheckSum: 00000000
ImageSize: 00064000
File version: 2.6.0.445
Product version: 2.6.0.445
File flags: 0 (Mask 3F)
File OS: 4 Unknown Win32
File type: 2.0 Dll
File date: 00000000.00000000
Translations: 0409.04b0
ProductName: InstallerDlg Module
InternalName: InstallerDlg
OriginalFilename: InstallerDlg.dll
ProductVersion: 2.6.0.445
FileVersion: 2.6.0.445
FileDescription: InstallerDlg Module
LegalCopyright: Copyright 2010

poc:
pocs availiable here: http://retrogod.altervista.org/9sg_realgames_ii.html
http://www.exploit-db.com/sploits/9sg_StubbyUtil.ProcessMgr.1.zip