how to prevent xss attacks in javascript

This article illustrates the YII framework's approach to preventing SQL injection, XSS attacks, and csrf attacks. Share to everyone for your reference, specific as follows: The methods commonly used in PHP are: /* Anti-SQL injection, XSS attack (1)/function Actionclean ($str) {$str =trim ($STR); $str =strip_t

troublesome thing for me is session spoofing (or csrf, you can refer to it as you like), because this attack is completely based on the user identity, therefore, there is no possibility to prevent it. If you don't know much about the session spoofing I just mentioned, you can read: http://www.playhack.net/view.php? Id = 303. Feasible Measures OK. From here on, I must assume that you have thoroughly understood the implementation method of session s

ASP. NET 1.1 introduces the ability to submit a form to automatically check for XSS (cross-site scripting attacks). When the user tries to use input such as server Error in '/yourapplicationpath ' application a potentially dangerous Request.Form value was detected from the client (txtname= " description:request Validation has detected a potentially dangerous Client input value, and proc

Label:nbsp; today, the system uses the IBM Security Vulnerability Scanning Tool to scan a bunch of vulnerabilities, the following filter is primarily to address the prevention of SQL injection and XSS attacks One is the filter responsible for wrapping the requested request. One is the request wrapper, which is responsible for filtering out illegal characters. After this filter is configured, the world is fi

Purpose:Restrict the length, range, format, and type of the input string.In the development of ASP. NETProgramUse request verification to prevent injection attacks.Use the ASP. NET verification control for input verification.Encode insecure output.Use the command parameter set mode to prevent injection attacks.Prevent detailed error information from being returned to the client. Overview: You should ve

This time to bring you PHP implementation to prevent cross-site and XSS attack steps in detail, PHP implementation to prevent cross-site and XSS attacks on the attention of what, the following is the actual case, take a look. Document Description: 1. Upload the waf.php to t

trouble. Now that we have discussed the basic rules, we will study the first threat: SQL injection attacks. Prevent SQL injection attacks In SQL injection attacks, you can manipulate the form or GETQuery string to add the information to the database query. For example, assume there is a simple login database. Each

encryption and decryption module, it can be used to set cookie values. Nginx_limit_access_module is a third-party module, which is still in beta stage. From readme, It is a blocking module and can be obtained based on ip addresses and other Nginx variables (any of the variable in Nginx) block, including a POST interface for maintaining the blocking policy, but not for attack feature recognition. Modsecurity is a third-party module that supports multiple web servers, such as apache, IIS, and Ngi

Purpose: Restrict the length, range, format, and type of the input string.Use request verification to prevent injection attacks when developing ASP. NET programs.Use the ASP. NET verification control for input verification.Encode insecure output.Use the command parameter set mode to prevent injection attacks.Prevent detailed error information from being returned

attacks are another way to launch an attack, but they are a slightly different approach. When performing a standard SQL injection attack, an attacker inserts an SQL query into a Web application, expecting the server to return an error message. This error message enables an attacker to obtain the information needed to perform a more precise attack. This causes the database administrator to believe that a message that eliminates this error will resolve

the session. This is the legendary CSRF attack.Don't underestimate CSRF. Remember that L-Blog had a CSRF Vulnerability (I didn't know this concept yet.Read: p), it adds the Administrator is such a link: http: // localhost/L-Blog/admincp. asp?Action = member type = editmem memID = 2 memType = SupAdmin.The administrator can access this URL. The Google CSRF vulnerability [1] will cause email leakage.In addition, do not think that only XSS can generat

Functionstrinput ($ input) {$ inputstrval ($ input); $ replacearray (union, load, and, or, select, update, insert, delete, create, char, ascII, ord, conv, --, #, *, %, _, \, function strinput ($ input) { $ Input = strval ($ input ); $ Replace = array ('Union ', 'load', 'and', 'or', 'select', 'update', 'insert', 'delete ', 'create', 'Char ', 'ascii', 'ord ', 'conv',' = ',' -- ',' # ',' * ',' % ', '_','\\','\'',"\""); $ Input = str_ireplace ($ replace, "0", $ input ); Return $ input; } Define a f

instr (strtemp, "net % 20 localgroup % 20 administrators") or instr (strtemp ,":") or instr (strtemp, "net % 20 user") or instr (strtemp, "") or instr (strtemp, "% 20or % 20") then Response. Write "Response. Write "alert (Invalid Address !!); " Response. Write "location. href = Error. asp ;" Response. Write "End if %> [Code end] C # Check strings to prevent SQL injection attacks This example is tentatively

|update| count|*|%| chr|mid|master|truncate|char|declare|;| Or|-|+|, "; You can also add your own stuff here. String[] Inj_stra=inj_str.split ("\\|"); for (int i=0; I { if (Str.indexof (Inj_stra[i]) gt;=0) { return true; } } return false; } } 5.JSP Page judgment Code: Use JavaScript to masking the client for unsafe words Function Description: Check if it contains "'", "\ \", "/" Parameter description: The string to check Return value: 0: Yes 1: No