[研究] [ASP.NET] DropDownList1 的 Cross-site scripting (XSS) (Reflected XSS) 修正

[研究] [ASP.NET] DropDownList1 的 Cross-site scripting (XSS) (Reflected XSS) 修正

2019-06-25

原始

string caption = DropDownList1.SelectedValue;     GridView1.Caption = caption;

修改後 (白名單 White List 做檢查)，分別使用 caption0 和 caption 變數

//  Cross-site scripting (XSS) (Reflected XSS) 修正             string caption0 = DropDownList1.SelectedValue;             switch (caption0)             {                 case "香蕉":                     caption = "香蕉";                     break;                 case "香蕉":                     caption = "香蕉";                     break;             }     GridView1.Caption = caption;

失敗的修改 (沒有另外使用變數，白箱測試工具 ( 源碼檢測) 可能仍會判斷為有問題

//  Cross-site scripting (XSS) (Reflected XSS) 修正             string caption = DropDownList1.SelectedValue;             switch (caption)             {                 case "香蕉":                     caption = "香蕉";                     break;                 case "香蕉":                     caption = "香蕉";                     break;             }     GridView1.Caption = caption;

(待續)


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