144 lines
No EOL
3.9 KiB
Text
144 lines
No EOL
3.9 KiB
Text
#######################################################################
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Luigi Auriemma
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Application: Siemens Automation License Manager
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http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&siteid=cseus&aktprim=0&extranet=standard&viewreg=WW&objid=10805384&treeLang=en
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Versions: <= 500.0.122.1
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Platforms: Windows
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Bugs: A] Service *_licensekey serialid code execution
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B] Service exceptions
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C] Service NULL pointer
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D] almaxcx.dll files overwriting
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Exploitation: remote
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Date: 28 Nov 2011
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Author: Luigi Auriemma
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e-mail: aluigi@autistici.org
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web: aluigi.org
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#######################################################################
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1) Introduction
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2) Bugs
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3) The Code
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4) Fix
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#######################################################################
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===============
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1) Introduction
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===============
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Siemens Automation License Manager is the system used by Siemens for
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handling the remote and local licenses of its HMI, SCADA and
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industrial products.
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This service is available in most of the products and it's necessary to
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their usage.
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#######################################################################
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=======
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2) Bugs
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=======
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--------------------------------------------
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Service *_licensekey serialid code execution
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--------------------------------------------
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Buffer overflow in the handling of the serialid field used in the
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various *_licensekey commands that share the same function for parsing
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the parameters.
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The vulnerability leads to code execution:
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011C7D96 8B01 MOV EAX,DWORD PTR DS:[ECX]
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011C7D98 8B10 MOV EDX,DWORD PTR DS:[EAX] ; controlled
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011C7D9A 6A 01 PUSH 1
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011C7D9C FFD2 CALL EDX
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---------------------
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B] Service exceptions
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---------------------
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Some long fields can be used to raise an exception:
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The exception unknown software exception (0xc0000417) occurred in
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the application at location 0x????????.
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The exception is caused by the usage of wcscpy_s in some functions
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that copy the values passed by the client into stack buffers.
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This is what happens with open_session->workstation->NAME (function
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00412060) or grant->VERSION and so on.
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Note that in some systems the exception doesn't lead to a direct Denial
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of Service (except the resources for the thread left active).
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-----------------------
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C] Service NULL pointer
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-----------------------
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NULL pointer dereference in the handling of the get_target_ocx_param
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and send_target_ocx_param commands.
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Note that in some systems the exception doesn't lead to a direct Denial
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of Service (except the resources for the thread left active).
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--------------------------------
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D] almaxcx.dll files overwriting
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--------------------------------
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The almaxcx.dll ActiveX component (ALMListView.ALMListCtrl
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E57AF4A2-EF57-41D0-8512-FECDA78F1FE7) has a Save method that allows to
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specify an arbitrary filename to save.
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The effect is the overwriting of any file with this empty one (just 2
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bytes "\r\n").
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Note that I can't exclude the possibility of controlling the content of
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the saved file allowing code execution, indeed I didn't test the
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component deeper to check this hypothesis so it remains open and who
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has more experience than me with this component can confirm it or not.
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#######################################################################
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===========
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3) The Code
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===========
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http://aluigi.org/poc/almsrvx_1.zip
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/18165.zip
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A]
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almsrvx_1 almsrvx_1a.dat SERVER
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B]
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almsrvx_1 almsrvx_1b1.dat SERVER
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almsrvx_1 almsrvx_1b2.dat SERVER
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C]
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almsrvx_1 almsrvx_1c.dat SERVER
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D]
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almsrvx_1d.htm
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#######################################################################
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======
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4) Fix
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======
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No fix.
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####################################################################### |