분류 전체보기264 [Pwnable.kr] (Pwnable) md5 calculator 풀이 md5 calculator | 200pt captcha 를 입력받고, BASE64 인코딩된값을 입력받고, MD5 한 결과를 돌려준다. gdb-peda$ checksec hash CANARY : ENABLED FORTIFY : disabled NX : ENABLED PIE : disabled RELRO : Partial 카나리와 NX가 설정되어있다. main undefined4 main(void) { uint __seed; int local_18; int local_14; setvbuf(stdout,(char *)0x0,1,0); setvbuf(stdin,(char *)0x0,1,0); puts("- Welcome to the free MD5 calculating service -"); __seed = t.. 2020. 7. 29. [CTF] rgbCTF 2020 Write up We got 168th place. I received my first prize, shodan premium. Although it was given to 1000 teams, I'm glad about my first prize. After CTF, I was disappointed in myself because I think I should have tried more creatively and intensively and solved more problems After the final exam, I will learn about CTF much more. REV Too Slow Advanced Reversing Machines 1 Crypto I Love Rainbows Beginner pie.. 2020. 7. 15. [HackCTF] (Pwnable) UAF Write-up 노트를 만들고 삭제할 수 있다. void add_note(void) { int iVar1; void *pvVar2; size_t __size; int in_GS_OFFSET; int local_20; char local_18 [8]; int local_10; local_10 = *(int *)(in_GS_OFFSET + 0x14); if (count < 6) { local_20 = 0; while (local_20 < 5) { if (*(int *)(notelist + local_20 * 4) == 0) { pvVar2 = malloc(8); *(void **)(notelist + local_20 * 4) = pvVar2; if (*(int *)(notelist + local_20 * 4) == 0) {.. 2020. 7. 7. [CTF] redpwnCTF 2020 Write up The design of that site was pretty cool. I got 235th place in redpwn ctf as a team name, New beginner PWN coffer-overflow-0 coffer-overflow-1 coffer-overflow-2 secret-flag the-library REV bubbly SMArT-solver PWNABLE coffer-overflow-0 #include #include int main(void) { long code = 0; char name[16]; setbuf(stdout, NULL); setbuf(stdin, NULL); setbuf(stderr, NULL); puts("Welcome to coffer overflow, .. 2020. 6. 28. 이전 1 ··· 40 41 42 43 44 45 46 ··· 66 다음
