Linux (x86) Exploit 开发系列教程之六（绕过ASLR - 第一部分）

原文:Linux (x86) Exploit Development Series 在线阅读 PDF格式 EPUB格式 MOBI格式 Github 译者 章节 译者 典型的基于堆栈的缓冲区溢出 hackyzh 整数溢出 hackyzh Off-By-One 漏洞(基于栈) hackyzh 使用 return-to-libc 绕过 NX bit hackyzh 使用链式 return-to-libc 绕过 NX bit hackyzh 绕过ASLR – 第一部分 hackyzh 绕过ASLR –

What is ASLR? Address space layout randomization (ASLR) is an exploit mitigation technique that randomizes Stack address. Heap address. Shared library address. #echo 2 > /proc/sys/kernel/randomize_va_space libc base address would get randomized. NOTE

What is NX Bit? Its an exploit mitigation technique which makes certain areas of memory non executable and makes an executable area, non writable. Example: Data, stack and heap segments are made non executable while text segment is made non writable.

A simple way to chain multiple libc functions is to place one libc function address after another in the stack, but its not possible because of function arguments. chaining seteuid, system and exit would allows us to exploit the vulnerable code 'vuln

What is off-by-one bug? Copying source string into destination buffer could result in off-by-one when Source string length is equal to destination buffer length. When source string length is equal to destination buffer length, a single NULL byte gets

What is Integer Overflow? Storing a value greater than maximum supported value is called integer overflow. Integer overflow on its own doesnt lead to arbitrary code execution, but an integer overflow might lead to stack overflow or heap overflow whic

原文:微信公众号开发系列教程一(调试环境部署续:vs远程调试) 目录 C#微信公众号开发系列教程一(调试环境部署) C#微信公众号开发系列教程一(调试环境部署续:vs远程调试) C#微信公众号开发系列教程二(新手接入指南) 前几天决定写个微信公众平台开发系列,在发布第一篇博文后,收到了很多园友的反馈和建议,在这里感谢大家的支持,我会坚持写完这个系列,希望能帮助更多的小伙伴.特别要感谢下@ZIP,是他的一个提醒才有了这篇博文.也希望更多的小伙伴能把你的想法反馈给我. 上一篇中主要介绍的是使用花生壳

原文:微信公众号开发系列教程一(调试环境部署) 目录 C#微信公众号开发系列教程一(调试环境部署) C#微信公众号开发系列教程一(调试环境部署续:vs远程调试) C#微信公众号开发系列教程二(新手接入指南) 微信公众号火了好一阵子了,笔者算是比较早接触微信公众号开发的了,大概做了一年半了,从最开始的到处网上找demo到现在也开发一些公众号.园子里关于微信开发的教程已经数不胜数了,我也准备来凑凑热闹.一是梳理下这段时间开发的经验,二是希望能帮到想做微信开发的小伙伴们,希望大大神们吐槽的时候悠着点,

http://www.cnblogs.com/zskbll/p/4093954.html 此系列前面已经更新了两篇博文了,都是微信开发的前期准备工作,现在切入正题,本篇讲解新手接入的步骤与方法,大神可直接跳过,也欢迎大神吐槽. 目录 C#微信公众号开发系列教程一(调试环境部署) C#微信公众号开发系列教程一(调试环境部署续:vs远程调试) C#微信公众号开发系列教程二(新手接入指南) 微信公众平台消息接口的工作原理大概可以这样理解:从用户端到公众号端一个流程是这样的,用户发送消息到微信服务器,微