csrf

CSRF攻击防御方法

拟墨画扇 提交于 2019-12-01 10:05:44
CSRF攻击防御方法 目前防御 CSRF 攻击主要有三种策略: 1、 验证 HTTP Referer 字段; 根据 HTTP 协议,在 HTTP 头中有一个字段叫 Referer,它记录了该 HTTP 请求的来源地址。对于每一个请求验证其 Referer 值 2、在请求地址中添加 token 并验证; 可以在 HTTP 请求中以参数的形式加入一个随机产生的 token,并在服务器端建立一个拦截器来验证这个 token,如果请求中没有 token 或者 token 内容不正确,则认为可能是 CSRF 攻击而拒绝该请求。 这种方法要比检查 Referer 要安全一些,token 可以在用户登陆后产生并放于 session 之中,然后在每次请求时把 token 从 session 中拿出,与请求中的 token 进行比对。 对于 GET 请求,token 将附在请求地址之后,这样 URL 就变成 http://www.wuliaokankan.cn?csrftoken=tokenvalue。 而对于 POST 请求来说,要在 form 的最后加上 <input type=”hidden” name=”csrftoken” value=”tokenvalue”/>,这样就把 token 以参数的形式加入请求了。但是,在一个网站中,可以接受请求的地方非常多,要对于每一个请求都加上 token

64 Django -- Ajax

微笑、不失礼 提交于 2019-12-01 08:56:21
目录 Ajax Ajax简介 AJAX常见应用情景 Ajax的优缺点 优点: 缺点: Ajax简单登录认证 csrf认证 form表单设置csrf_token Ajax设置csrf认证 文件上传 请求头Content-Type form表单上传文件 Ajax的上传文件 JsonResponse SweetAlert插件--对话框 Ajax Ajax简介 AJAX(Asynchronous Javascript And XML)翻译成中文就是“异步的Javascript和XML”。即使用Javascript语言与服务器进行异步交互,传输的数据为XML(当然,传输的数据不只是XML,现在更多使用json数据)。 ​ AJAX 最大的优点是在不重新加载整个页面的情况下 ,可以与服务器交换数据并更新部分网页内容。(这一特点给用户的感受是在不知不觉中完成请求和响应过程) AJAX 不需要任何浏览器插件,但需要用户允许JavaScript在浏览器上执行。 特点:异步请求、局部刷新 异步交互:客户端发出一个请求后,无需等待服务器响应结束,就可以发出第二个请求。 局部刷新:可以局部添加网页内容,如提示:用户名或者密码错误等。 AJAX常见应用情景 搜索引擎根据用户输入的关键字,自动提示检索关键字。 注册时的用户名的查重。 ​ 当输入用户名后,把光标移动到其他表单项上时

HOWTO do CSRF protection in Struts2 application for AJAX requests

这一生的挚爱 提交于 2019-12-01 08:51:01
问题 I have a struts2 webapp in which I need to implement CSRF protection. For statis forms it is pretty straight forward. I just need to activate the tokenSession interceptor & then set <s:token/> in the form to be submitted. (explained here and here) But the problem appears when I need to enable CSRF protection for POST AJAX calls (I am using jQuery) which are not necessarily submitted via forms. I face the issue of re-using token when making subsequent AJAX calls. Any pointers or different

TinyMCE and Laravel 5.3 TokenMismatchException

≯℡__Kan透↙ 提交于 2019-12-01 08:21:28
I'm trying to implement TinyMCE image uploads, using Laravel 5.3 on the server side: here is my JS for TinyMCE, which is currently in a blade template: <script src="{{ URL::to("/tinymce/tinymce.min.js") }}"></script> <script> tinymce.init({ selector: 'textarea', plugins: [ "advlist autolink lists link image charmap print preview hr anchor pagebreak", "searchreplace wordcount visualblocks visualchars code fullscreen", "insertdatetime media nonbreaking save table contextmenu directionality", "emoticons template paste textcolor colorpicker textpattern" ], toolbar: "insertfile undo redo |

DAY21:CSRF

▼魔方 西西 提交于 2019-12-01 07:42:24
一、什么是CSRF 1. CSRF(XSRF)定义 2. CSRF原理介绍 3. CSRF攻击的两个条件 ①登录受信任网站A,并在本地生成cookie ②在不登出网站A的情况下,访问危险网站B 4. CSRF与XSS的区别 csrf不要求网站有其他漏洞,使用起来更方便,但此漏洞有很大缺陷,需要知道向哪个页面提交请求,请求参数是什么样的,一般用在对网站很了解或在代码审计后挖到了CSRF漏洞后 5. CSRF防御手段 (1)验证token值。 (2)验证HTTP头的Referer。 (3)用XMLHttpRequest附加在header里。 二、CSRF简单利用 1. CSRF提交GET请求(DVWA实验) 2. CSRF提交POST请求 3. AJAX, 同源策略 跨域请求 (了解概念) 利用 AJAX 来执行 CSRF 漏洞失败(在 CSRF 里就不要用ajax): 4. CSRF与XSS结合(DVWA实验) 利用存储型xss漏洞写入CSRF攻击语句到数据库,每当管理员查看存储数据时都会执行CSRF攻击语句 5. 了解同源策略和跨域请求 https://www.cnblogs.com/rockmadman/p/6836834.html ①先来说说什么是源 • 源(origin)就是协议、域名和端口号。 以上url中的源就是:http://www.company.com:80

Play 2.5 disable csrf protection for some requests

℡╲_俬逩灬. 提交于 2019-12-01 07:17:15
问题 I'm writing my app using play framework v. 2.5.3 and use CSRF protection as it is described in official documentation. public class Filters implements HttpFilters { @Inject CSRFFilter csrfFilter; @Override public EssentialFilter[] filters() { return new EssentialFilter[]{csrfFilter.asJava()}; }} Of course, it works, as long as all of requests need to be filtered, but some of them should be bypassed. How can filters be configured to bypass requests to some specified route? Thanks for your help

08-Django模板(2)

喜欢而已 提交于 2019-12-01 07:05:45
一、HTML转义   在视图中,通过调用模板传递下文,模板对上下文的传递字符串进行输出时,会对以下字符自动转义。HTML转义的作用:转义后标记代码不会被直接解释执行,而是被直接呈现,防止客户端通过嵌入js代码攻击网站。 小于号 < 转换为 < 大于号 > 转换为 > 单引号 ' 转换为 ' 双引号 " 转换为 " 与符号 & 转换为 & HTML转义演示: 匹配URL: path('zhuanyi/', views.zhuanyi), 视图: def zhuanyi(request): content = {"text":"<h1>标题一</h1>"} #调用模板传入HTML字符串 return render(request,"Book/zhuanyi.html",content) 模板: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>转义演示</title> </head> <body> <p>{{ text }}</p> </body> </html> 结果: 我们在视图传入的HTML标签没有被浏览器执行,就是为了防止js攻击。在模板渲染的时候进行了转义,这样浏览器就不会认出来是专属的标签啦。 禁止HTML转义 {{变量|escape}} 过滤器escape可以实现对变量的HTML转义

Are JAXRS restful services prone to CSRF attack when content type negotiation is enabled?

[亡魂溺海] 提交于 2019-12-01 06:51:18
I have a RESTful API which has annotations like @Consumes(MediaType.JSON) - in that case, would the CSRF attack still be possible on such a service? I've been tinkering with securing my services with CSRFGuard on server side or having a double submit from client side. However when I tried to POST requests using FORM with enctype="text/plain", it didn't work. The technique is explained here This works if I have MediaType.APPLICATION_FORM_URLENCODED in my consumes annotation. The content negotiation is useful when I'm using POST/PUT/DELETE verbs but GET is still accessible which might need

Basic cookie & CSRF question

会有一股神秘感。 提交于 2019-12-01 06:31:34
I'm currently learning more about CSRF and I have a basic question about cookies. From Jeff Atwood's article on CSRF : "When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same. When an attacker submits a form on behalf of a user, he can only modify the values of the form. An attacker cannot read any data sent from the server or modify cookie values, per the same-origin policy. This means that while an attacker can send any value he wants with the form, he will be unable to modify or read the value stored in the

Testing scala Play (2.2.1) controllers with CSRF protection

╄→尐↘猪︶ㄣ 提交于 2019-12-01 06:30:49
I've been having some problems testing controllers that use Play's CSRF protection. To demonstrate this, I've created a very simple Play application that minimally exhibits the problem. https://github.com/adamnfish/csrftest The full details are on the README of that repository, but to summarise here: Consider a controller that is designed to handle a form submission. It has a GET method that uses CSRFAddToken and a POST method that uses CSRFCheck. The former adds a CSRF Token to the request so that a form field can be put in the rendered view, containing the valid token. When that form is