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Strive for Freedom | 知难行易

Sdot; 544 Views. Sdot; 0 Comment. 我的博客 http:/ blog.striveforfreedom.net Table of Contents 1 简介 2 检查过程 3 小结 1 简介 最近在看一个开源网站的代码,发现如果登录页面是通过http协议请求的,会重定向到使用https协议的url,这样可以保证登录安全。 2 检查过程 先运行Wireshark,Filter用http contains jd.com。 京东登录页面地址是https:/ passport.jd.com/new/login.aspx, 把https改成http,在浏览器地址栏里输入http:/ passport.jd.com/new/login.aspx, 回车,然后查看Wir …阅读全文. Sdot; 1082 Views. Sdot; 1 Comment. 用gdb查看,引发崩溃的是一条这样的指令 mov register offset(%rsp)。 发生崩溃的机器是X86 64 Linux,用ulimit -s得知进程栈默认的soft limit是10M …阅读全文. 我的博客 http...

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Strive for Freedom | 知难行易 | blog.striveforfreedom.net Reviews
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Sdot; 544 Views. Sdot; 0 Comment. 我的博客 http:/ blog.striveforfreedom.net Table of Contents 1 简介 2 检查过程 3 小结 1 简介 最近在看一个开源网站的代码,发现如果登录页面是通过http协议请求的,会重定向到使用https协议的url,这样可以保证登录安全。 2 检查过程 先运行Wireshark,Filter用http contains jd.com。 京东登录页面地址是https:/ passport.jd.com/new/login.aspx, 把https改成http,在浏览器地址栏里输入http:/ passport.jd.com/new/login.aspx, 回车,然后查看Wir …阅读全文. Sdot; 1082 Views. Sdot; 1 Comment. 用gdb查看,引发崩溃的是一条这样的指令 mov register offset(%rsp)。 发生崩溃的机器是X86 64 Linux,用ulimit -s得知进程栈默认的soft limit是10M …阅读全文. 我的博客 http...
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1 strive for freedom
2 知难行易
3 一个京东登录的安全漏洞
4 by striveforfreedom
5 今天心血来潮,想看看京东有没有这样处理,意外发现京东在这方面存在安全漏洞
6 一个栈溢出的bug
7 猜测有可能是栈溢出了,需要证实这个想法
8 索引压缩算法new pfordelta的实现
9 下面给出了pack/unpack函数的三个版本的实现
10 x86 64上没有写c函数声明导致的bug
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strive for freedom,知难行易,一个京东登录的安全漏洞,by striveforfreedom,今天心血来潮,想看看京东有没有这样处理,意外发现京东在这方面存在安全漏洞,一个栈溢出的bug,猜测有可能是栈溢出了,需要证实这个想法,索引压缩算法new pfordelta的实现,下面给出了pack/unpack函数的三个版本的实现,x86 64上没有写c函数声明导致的bug,感觉这个bug在x86 64上还挺有代表性,因此这里把它记录下来,山寨了一个wordpress主题,最近文章,emacs
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Strive for Freedom | 知难行易 | blog.striveforfreedom.net Reviews

https://blog.striveforfreedom.net

Sdot; 544 Views. Sdot; 0 Comment. 我的博客 http:/ blog.striveforfreedom.net Table of Contents 1 简介 2 检查过程 3 小结 1 简介 最近在看一个开源网站的代码,发现如果登录页面是通过http协议请求的,会重定向到使用https协议的url,这样可以保证登录安全。 2 检查过程 先运行Wireshark,Filter用http contains jd.com。 京东登录页面地址是https:/ passport.jd.com/new/login.aspx, 把https改成http,在浏览器地址栏里输入http:/ passport.jd.com/new/login.aspx, 回车,然后查看Wir …阅读全文. Sdot; 1082 Views. Sdot; 1 Comment. 用gdb查看,引发崩溃的是一条这样的指令 mov register offset(%rsp)。 发生崩溃的机器是X86 64 Linux,用ulimit -s得知进程栈默认的soft limit是10M …阅读全文. 我的博客 http...

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Strive for Freedom | emacs

http://blog.striveforfreedom.net/index.php/tag/emacs

用emacs org-mode写博客 and 发布到博客园碰到的几个问题. Sdot; 1803 Views. Sdot; 0 Comment. 我的博客 http:/ blog.striveforfreedom.net Table of Contents 1 简介 2 发布博客到博客园碰到的问题 2.1 某些模板缩进异常的问题 2.2 多出一个标题的问题 2.3 标题前出现太多空行的问题 3 小结 1 简介 最近想写个博客 主要是技术博客 ,记录平时生活与工作中想法和问题,在网上搜了一圈,发现博客园挺好的,于是就打算在博客园安营扎寨了。 因为平时是用emacs写代码的,很自然地就打算用emacs(version 24.2) org-mode(version 7.8.11)来写博客了,不过在博客园测试发表博客的时候发现了几个问题,摸索了几天终于解决掉了,因此有了这篇文章,希望对碰到类似问题的朋友有所帮助。 2 发布博客到博客园碰到的问题 …阅读全文. Linux & X86上Segmentation fault原因分析. 用emacs org-mode写博客 & 发布到博客园碰到的几个问题.

2

Strive for Freedom | Linux

http://blog.striveforfreedom.net/index.php/tag/linux

Linux and X86上Segmentation fault原因分析. Sdot; 194688 Views. Sdot; 2 Comments. 我的博客 http:/ blog.striveforfreedom.net Table of Contents 1 简介 2 导致段错误的3种常见内存访问方式 2.1 用户模式访问内核空间 2.2 访问尚未建立的内存空间 2.3 写访问只读空间 3 系统对段错误的处理 3.1 CPU对段错误的捕获 3.2 内核对段错误的处理 3.3 用户程序对段错误的处理 4 小结 1 简介 在Linux上写C程序,段错误(Segmentation fault)很常见,估计每个程序员都曾碰到过,进程碰到段错误直接原因是进程收到了SIGSEGV信号并且没有捕获这个信号。 Linux & X86上Segmentation fault原因分析. 用emacs org-mode写博客 & 发布到博客园碰到的几个问题.

3

Strive for Freedom | striveforfreedom

http://blog.striveforfreedom.net/index.php/author/striveforfreedom

Sdot; 994 Views. Sdot; 0 Comment. 我的博客 http:/ blog.striveforfreedom.net Table of Contents 1 简介 2 检查过程 3 小结 1 简介 最近在看一个开源网站的代码,发现如果登录页面是通过http协议请求的,会重定向到使用https协议的url,这样可以保证登录安全。 2 检查过程 先运行Wireshark,Filter用http contains jd.com。 京东登录页面地址是https:/ passport.jd.com/new/login.aspx, 把https改成http,在浏览器地址栏里输入http:/ passport.jd.com/new/login.aspx, 回车,然后查看Wir …阅读全文. Sdot; 1791 Views. Sdot; 1 Comment. 用gdb查看,引发崩溃的是一条这样的指令 mov register offset(%rsp)。 发生崩溃的机器是X86 64 Linux,用ulimit -s得知进程栈默认的soft limit是10M …阅读全文. 我的博客 http...

4

Strive for Freedom | 一个京东登录的安全漏洞

http://blog.striveforfreedom.net/index.php/一个京东登录的安全漏洞

Sdot; 993 Views. Sdot; 0 Comment. 我的博客 http:/ blog.striveforfreedom.net. 先运行Wireshark,Filter用http contains jd.com。 京东登录页面地址是 https:/ passport.jd.com/new/login.aspx. 把https改成http,在浏览器地址栏里输入 http:/ passport.jd.com/new/login.aspx. 我首先试了亚马逊的登录页面,发现亚马逊没有这种问题,如果用户是使用http协议访问登录页面,亚马逊会返回一个HTTP/1.1 302 Moved Temporarily响应,Location响应头字段里会包含使用https协议的url,浏览器则会被重定向到访问安全的登录地址。 Linux & X86上Segmentation fault原因分析. 用emacs org-mode写博客 & 发布到博客园碰到的几个问题.

5

Strive for Freedom | 一个栈溢出的BUG

http://blog.striveforfreedom.net/index.php/一个栈溢出的bug

Sdot; 1790 Views. Sdot; 1 Comment. 我的博客 http:/ blog.striveforfreedom.net. 用gdb查看,引发崩溃的是一条这样的指令 mov register offset(%rsp)。 发生崩溃的机器是X86 64 Linux,用ulimit -s得知进程栈默认的soft limit是10MB,因为程序代码并没有调用setrlimit调整过栈的soft limit,于是需要证明出现段错误的进程栈大于10MB了,导致崩溃的地址可以从gdb中查看,如果知道栈的起始地址 栈底 ,两者之差就是栈的大小。 10 * (1U 20); char. Len]; data[0] = 'a'. 编译完一运行,出乎意料的是,进程竟然没崩溃 这就非常奇怪了,因为我在main函数里定义了10MB大小的数组 并且访问了第一个元素,即最地址最小的那个 ,且不说环境变量所占空间,单这个数组加上C运行库调用序列所占空间就超过10MB了,而栈soft limit是10MB,按理说必然崩溃。 Resource = RLIM NLIMITS) return. 一比较就可以发现官方内核...

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Sdot; 544 Views. Sdot; 0 Comment. 我的博客 http:/ blog.striveforfreedom.net Table of Contents 1 简介 2 检查过程 3 小结 1 简介 最近在看一个开源网站的代码,发现如果登录页面是通过http协议请求的,会重定向到使用https协议的url,这样可以保证登录安全。 2 检查过程 先运行Wireshark,Filter用http contains jd.com。 京东登录页面地址是https:/ passport.jd.com/new/login.aspx, 把https改成http,在浏览器地址栏里输入http:/ passport.jd.com/new/login.aspx, 回车,然后查看Wir …阅读全文. Sdot; 1082 Views. Sdot; 1 Comment. 用gdb查看,引发崩溃的是一条这样的指令 mov register offset(%rsp)。 发生崩溃的机器是X86 64 Linux,用ulimit -s得知进程栈默认的soft limit是10M …阅读全文. 我的博客 http...

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