off-by-one 指程序向缓冲区中写入时,写入的字节数超过了这个缓冲区本身所申请的字节数并且只越界了一个字节。 Asis CTF 2016 b00ks 配置搭建环境 环境:pwndocker配置: # 配置libc的版本 cp /glibc/2.23/64/lib/ld-2.23.so /tmp/ld-2.23.so patchelf --set-interpreter /tmp/ld-2.23.so ./b00ks LD_...
PWN入门之 OFF-BY-ONE 堆漏洞的利用 1.of-by-one 的分类: off-by-one总共可以分为两种利用方式 chunk overlapping off-by-one overwrite allocated off-by-one overwrite freed off-by-one null byte unlink off-by-one small bin off-by-one large bin 这种划分的依据是基于利用的思路不同。 第一种的利...
($ComputerSid))" $SDBytes = New-Object byte[] ($SD.BinaryLength) $SD.GetBinaryForm($SDBytes, 0) #Next, we need to set the security descriptor in the msDS-AllowedToActOnBehalfOfOtherIdentity field of the computer account we're taking over, again using PowerView Get-DomainComputer Target...
NULL);setbuf(stdout,NULL);printf("Welcome to House of Einherjar 2!\n");printf("Tested on Ubuntu 20.04 64bit (glibc-2.31).\n");printf("This technique can be used when you have an off-by-one into a malloc'ed region with a null byte.\n");printf("This file ...
*(_BYTE *)result = 0; returnresult; } } returnresult; } Second step 在第一步我们对程序的漏洞点寻找完毕 现在我们要开始第二步去利用off by one创建fake chunk了,先上交互函数 from pwn import * context(log_level='debug') r=process('./vn') ...
from pwn import * #p = process(["./ld-2.32.so", "./pwn"],env={"LD_PRELOAD":"./libc-2.32.so"}) #p = process("./pwn") context(os='linux', arch='amd64', log_level='debug') p = remote("node2.yuzhian.com.cn",3636...
frompwnimport*#from pwncli import *fromtoolsimportload,log_addr,log,debug#p,e,libc=load('a')p=process('./a') e=ELF('./a') libc=ELF('/home/hacker/Desktop/libc-2.31.so') context.log_level='debug'context.arch='amd64'p.recvuntil('gift:') ...
pwnable.kr - non-commercial wargame site which provides various pwn challenges. Pwnable.tw - is a wargame site for hackers to test and expand their binary exploiting skills. picoCTF - is a free computer security game targeted at middle and high school students. CTFlearn - is an online platfor...
frompwnimport*fromLibcSearcherimport*# from ae64 import AE64# from ctypes import cdllfilename='./vuln'context.arch='amd64'context.log_level='debug'# context.terminal = ['tmux', 'neww']local=1all_logs=[]elf=ELF(filename)libc=elf.libciflocal:sh=process(filename)else:sh=remote('localho...
*(_BYTE *)result = 0; return result; } } return result; } Second step 在第一步我们对程序的漏洞点寻找完毕 现在我们要开始第二步去利用off by one创建fake chunk了,先上交互函数 from pwn import * context(log_level='debug') r=process('./vn') ...