####################################################################### Luigi Auriemma Application: Iconics GENESIS32 and GENESIS64 http://www.iconics.com/Home/Products/HMI-and-SCADA/GENESIS32.aspx http://www.iconics.com/Home/Products/HMI-and-SCADA/GENESIS64.aspx Versions: GENESIS32 <= 9.21 GENESIS64 <= 10.51 GenBroker.exe and GenBroker64.exe are the same version on both the softwares: 9.21.201.01 Platforms: Windows Bug: integer overflow Exploitation: remote, versus server Date: 21 Mar 2011 (found 08 Jan 2011) Author: Luigi Auriemma e-mail: aluigi@autistici.org web: aluigi.org ####################################################################### 1) Introduction 2) Bug 3) The Code 4) Fix ####################################################################### =============== 1) Introduction =============== Iconics Genesis is a SCADA HMI solution used worldwide with customers that go from Beijing Traffic Control Center to the Pentagon and even Poste Italiane ("Case Studies" source). Informations from the vendor's website: "GENESIS32™ is the industry’s first and only fully scalable suite of OPC, SNMP, BACnet and Web-enabled HMI and SCADA applications." ####################################################################### ====== 2) Bug ====== GenBroker is a Windows service running on port 38080. The addresses and code snippets reported here are referred to GENESIS32 9.2. The service is affected by an integer overflow vulnerability during the handling of the opcodes 0xdae and 0xdb0 that make use of the function 0044C6B0 caused by the allocation of the memory needed for the creation of an array trusting the number of elements passed by the client. The resulting memory corruptions (like direct registry calls, memory locations calls, writing of data in arbitrary locations and so on) allow code execution. Vulnerable code: 0044C7C8 |. E8 A3A9FCFF CALL 00417170 ; get 32bit 0044C7CD |. 8B07 MOV EAX,DWORD PTR DS:[EDI] 0044C7CF |. 85C0 TEST EAX,EAX 0044C7D1 |.^ 74 C5 JE SHORT 0044C798 0044C7D3 |. C1E0 02 SHL EAX,2 ; * 4 0044C7D6 |. 50 PUSH EAX 0044C7D7 |. E8 DCA90500 CALL ; malloc 0044C7DC |. 8B0F MOV ECX,DWORD PTR DS:[EDI] 0044C7DE |. C1E1 02 SHL ECX,2 ; * 4 0044C7E1 |. 51 PUSH ECX 0044C7E2 |. 8947 04 MOV DWORD PTR DS:[EDI+4],EAX 0044C7E5 |. E8 CEA90500 CALL ; malloc ####################################################################### =========== 3) The Code =========== http://aluigi.org/poc/genesis_iof.zip genesis_iof 7 SERVER ####################################################################### ====== 4) Fix ====== No fix. UPDATE 08 Apr 2011: GenBroker.exe 9.22.202.11 #######################################################################