wargame/vortex 썸네일형 리스트형 vortex7 Vortex Level 7 → Level 8Checksum FunThis level requires CRC_32(argv[1], strlen(argv[1])) to be 0xe1ca95ee. You might need to extract the crc tables from the program.Reading MaterialCRC and How to Reverse ItIncluded file: vortex7.cint main(int argc, char **argv) { char buf[58]; u_int32_t hi; if((hi = crc32(0, argv[1], strlen(argv[1]))) == 0xe1ca95ee) { strcpy(buf, argv[1]); } else { printf("0x%08.. 더보기 vortex6 Vortex Level 6 → Level 7Generic Binary ExploitationYou must disassemble this level’s exploitable application in order to find the hole.Reading MaterialReconstructing Binaries to C For BeginnersReverse Engineering - Functions… functions! functions!? sheeshBinary downloadvortex6.bin 소스코드는 없고 파일만 있다.디버깅해서 취약점으로 exploit해야한다. ida로 attach시켜서 메인함수를 본 모습이다.끝에 printf가 보이는것으로 봐서 FSB를 사용해 exploit하면 될것같다. 하.. 더보기 vortex5 Vortex Level 5 → Level 6MD5 Brute ForceA password is required for the next level. vortex5.c and md5.h. a-z,A-Z,0-9 is the search space. The password length is 5 chars long, it was originally 7 chars long.Collision(s) tested : 489265082 in 217 second(s), 361 millisec, 101 microsec. Average of 2250932.1 hashes/sec. Included file: vortex5.c/* A tribute to arc :) */ /* ** SQLite uses this code for t.. 더보기 vortex4 Vortex Level 4 → Level 5To exec or not to execThis is the common format string bug, exploit it with care though as a check is made with argc. What is the layout of a process’s memory? How are programs executed?Reading MaterialFormat String TechniqueExploiting Format String VulnerabilitiesBypassing StackGuard and StackShieldIncluded file: vortex4.c// -- andrewg, original author was zen-parse :) #.. 더보기 vortex3 Vortex Level 3 → Level 4A Stack Overflow with a DifferenceThis level is pretty straight forward. Just sit down and understand what the code is doing. Your shellcode will require a setuid(LEVEL4_UID) since bash drops effective privileges. You could alternatively write a quick setuid(geteuid()) wrapper around bash.NOTE: ctors/dtors might no longer be writable, although this level is compiled with .. 더보기 vortex2 Vortex Level 2 → Level 3Level GoalCreate a special tar fileHelpful Reading MaterialGNU tar manualIncluded file: vortex2.c#include #include #include int main(int argc, char **argv) { char *args[] = { "/bin/tar", "cf", "/tmp/ownership.$$.tar", argv[1], argv[2], argv[3] }; execv(args[0], args); } 소스를 해석하자면 execv 함수로 다음의 명령을 실행한다./bin/tar -cf /tmp/ownership.$$.tar argv[1] argv[2] argv[3]tar 에 c옵션은 새.. 더보기 vortex1 Putty를 이용해 vortex0에서 얻은 계정을 가지고 vortex.labs.overthewire.org에 ssh로 접속한다.일단 타겟의 위치는 /games/vortex/vortex1이고 해당 소스코드는 홈페이지의 해당 문제 페이지에 있다. #include #include #include #include #define e(); if(((unsigned int)ptr & 0xff000000)==0xca000000) { setresuid(geteuid(), geteuid(), geteuid()); execlp("/bin/sh", "sh", "-i", NULL); } void print(unsigned char *buf, int len) { int i; printf("[ "); for(i=0; i < len.. 더보기 vortex0 문제는 이렇다.Your goal is to connect to port 5842 on vortex.labs.overthewire.org and read in 4 unsigned integers in host byte order. Add these integers together and send back the results to get a username and password for vortex1. This information can be used to log in using SSH.Note: vortex is on an 32bit x86 machine (meaning, a little endian architecture)vortex.labs.overthewire.org 5842로 접속해서 4의 정수.. 더보기 이전 1 다음
