[原]网站跨站点脚本，Sql注入等攻击的处理

从360安全论坛里找到的一段代码，经过整理封装，直接在站点Global.asax文件或写一个HttpModule来拦截恶意请求即可；
http://bbs.webscan.360.cn/forum.php?mod=viewthread&tid=711&page=1&extra=#pid1927

using System.Text.RegularExpressions;
using System.Web;

/// <summary>
/// Web请求安全检查：防止跨站点脚本,Sql注入等攻击,来自:http://bbs.webscan.360.cn/forum.php?mod=viewthread&tid=711&page=1&extra=#pid1927
/// 检查数据包括:
/// 1.Cookie
/// 2.当前页面地址
/// 3.ReferrerUrl
/// 4.Post数据
/// 5.Get数据
/// </summary>
public class Safe360
{
#region 执行安全检查

/// <summary>
/// 执行安全检查
/// </summary>
public static void Procress()
{
const string errmsg =
"<div style='position:fixed;top:0px;width:100%;height:100%;background-color:white;color:green;font-weight:bold;border-bottom:5px solid #999;'><br>您的提交带有不合法参数,谢谢合作!<br><br>了解更多请点击:<a href='http://webscan.360.cn'>360网站安全检测</a></div>";

if (RawUrl())
{
HttpContext.Current.Response.Write(errmsg);
HttpContext.Current.Response.End();
}

if (CookieData())
{
HttpContext.Current.Response.Write(errmsg);
HttpContext.Current.Response.End();
}

if (HttpContext.Current.Request.UrlReferrer != null)
{
if (Referer())
{
HttpContext.Current.Response.Write(errmsg);
HttpContext.Current.Response.End();
}
}

if (HttpContext.Current.Request.RequestType.ToUpper() == "POST")
{
if (PostData())
{
HttpContext.Current.Response.Write(errmsg);
HttpContext.Current.Response.End();
}
}
if (HttpContext.Current.Request.RequestType.ToUpper() == "GET")
{
if (GetData())
{
HttpContext.Current.Response.Write(errmsg);
HttpContext.Current.Response.End();
}
}
}

#endregion

#region 安全检查正则

/// <summary>
/// 安全检查正则
/// </summary>
private const string StrRegex =
@"<[^>]+?style=[\w]+?:expression\(|\b(alert|confirm|prompt)\b|^\+/v(8|9)|<[^>]*?=[^>]*?&#[^>]*?>|\b(and|or)\b.{1,6}?(=|>|<|\bin\b|\blike\b)|/\*.+?\*/|<\s*script\b|<\s*img\b|\bEXEC\b|UNION.+?SELECT|UPDATE.+?SET|INSERT\s+INTO.+?VALUES|(SELECT|DELETE).+?FROM|(CREATE|ALTER|DROP|TRUNCATE)\s+(TABLE|DATABASE)";

#endregion

#region 检查Post数据

/// <summary>
/// 检查Post数据
/// </summary>
/// <returns></returns>
private static bool PostData()
{
bool result = false;

for (int i = 0; i < HttpContext.Current.Request.Form.Count; i++)
{
result = CheckData(HttpContext.Current.Request.Form[i]);
if (result)
{
break;
}
}
return result;
}

#endregion

#region 检查Get数据

/// <summary>
/// 检查Get数据
/// </summary>
/// <returns></returns>
private static bool GetData()
{
bool result = false;

for (int i = 0; i < HttpContext.Current.Request.QueryString.Count; i++)
{
result = CheckData(HttpContext.Current.Request.QueryString[i]);
if (result)
{
break;
}
}
return result;
}

#endregion

#region 检查Cookie数据

/// <summary>
/// 检查Cookie数据
/// </summary>
/// <returns></returns>
private static bool CookieData()
{
bool result = false;
for (int i = 0; i < HttpContext.Current.Request.Cookies.Count; i++)
{
result = CheckData(HttpContext.Current.Request.Cookies[i].Value.ToLower());
if (result)
{
break;
}
}
return result;
}

#endregion

#region 检查Referer

/// <summary>
/// 检查Referer
/// </summary>
/// <returns></returns>
private static bool Referer()
{
return CheckData(HttpContext.Current.Request.UrlReferrer.ToString());
}

#endregion

#region 检查当前请求路径

/// <summary>
/// 检查当前请求路径
/// </summary>
/// <returns></returns>
private static bool RawUrl()
{
return CheckData(HttpContext.Current.Request.RawUrl);
}

#endregion

#region 正则匹配

/// <summary>
/// 正则匹配
/// </summary>
/// <param name="inputData"></param>
/// <returns></returns>
private static bool CheckData(string inputData)
{
return Regex.IsMatch(inputData, StrRegex);
}

#endregion
}

在Global.asax里调用的代码：

private void Application_BeginRequest(object sender, EventArgs e)

{

Safe360.Procress();

}

作者：a497785609 发表于2014-4-16 17:14:29 原文链接

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