####################################################################### 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 opcode 0x26ac 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. Fields in the packet: 32 malloc(x * 4) Vulnerable code: 00445AC7 |. E8 A416FDFF CALL 00417170 ; get 32bit 00445ACC |. 8B03 MOV EAX,DWORD PTR DS:[EBX] 00445ACE |. 85C0 TEST EAX,EAX 00445AD0 |.^ 76 BE JBE SHORT 00445A90 00445AD2 |. 8D1485 000000>LEA EDX,DWORD PTR DS:[EAX*4] ; * 4 00445AD9 |. 52 PUSH EDX 00445ADA |. E8 D9160600 CALL ; malloc ####################################################################### =========== 3) The Code =========== http://aluigi.org/poc/genesis_iof.zip genesis_iof 12 SERVER ####################################################################### ====== 4) Fix ====== No fix. UPDATE 08 Apr 2011: GenBroker.exe 9.22.202.11 #######################################################################