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    # Authentication [TOC] ## APPRENTICE ### Lab: Username enumeration via different responses --2023/05/02 在開始前告訴我們可以爆破,還給了 username 和 passwd 的字典檔,我還不好好地用他 OVO ![](https://i.imgur.com/yOaz8od.png) 啊就不廢話了,直接進來 login 的部分,先隨便輸入帳密,然後用 burpsuite 去攔截封包 ![](https://i.imgur.com/5EDbBvT.png) 我們先從 username 確認起,attacke type 確認是 sniper ![](https://i.imgur.com/UYHsesg.png) 接下來在 payload 這邊, payload sets 的 type 選擇 simple list,接著在 payload settings 將剛才儲存的username字典檔拉進來 ![](https://i.imgur.com/BihUA1k.png) 點擊右上的 "start attack" 就會開始爆破,跑完後可以發現有一個名字的回應長度跟別人不一樣,所以 username 就是他了 "au" ![](https://i.imgur.com/nh19At5.png) 接著將找到的帳號輸入,換成爆破密碼啦 ![](https://i.imgur.com/RldWPoy.png) 一樣的步驟,只是這次換成 passwd 去跑 ![](https://i.imgur.com/4oDmE8p.png) 跑完後,可以很明顯看到密碼是誰了XD ![](https://i.imgur.com/GKm12bi.png) 輸入就解完啦! ![](https://i.imgur.com/CLiXFwv.png) ### Lab: 2FA simple bypass --2023/05/02 這一題要繞過二部驗證,首先先用 wener:peter 這一組(你的)登入 ![](https://i.imgur.com/brWh1a2.png) 登入後要求二部驗證,點擊上面的 "Email client",就是到你的 email 去拿驗證碼 ![](https://i.imgur.com/WT7ECnA.png) 驗證碼就在旁邊 OUO ![](https://i.imgur.com/qiy1FZg.png) 輸入驗證碼後就進來啦 ![](https://i.imgur.com/NYawH82.png) 之後登出改成用 carlos:montoya (要攻擊的帳密)登入,(Congratulation 那行先忽略),要求要驗證碼 ![](https://i.imgur.com/6DdqIMB.png) 接著在 URL 上輸入 ```/my-account``` 就登入了 ![](https://i.imgur.com/rnuNNEj.png) ![](https://i.imgur.com/Lmh4KTx.png) 簡單來說就是這樣 (來源:https://portswigger.net/web-security/authentication/multi-factor) ![](https://i.imgur.com/B5YoDTa.png) ### Lab: Password reset broken logic --2023/05/02 要透過重設密碼來繞過驗證,登入 Carlos 的帳號 ![](https://i.imgur.com/WIUak5V.png) 點擊 "forget password" 然後輸入 "wiener" ![](https://i.imgur.com/UmVsXPG.png) 然後她會告訴你,去檢查你的 email 來重設密碼 ![](https://i.imgur.com/TPEE8bP.png) 送出前記得先打開 burpsuite 來抓包 ![](https://i.imgur.com/lPl5INd.png) 抓到長這樣 ![](https://i.imgur.com/5vGlrfT.png) 將 POST 欄位中 ```temp-forgot-password-token=``` 後面的 token 刪除,最下面的 ```temp-forgot-password-token=``` 也刪掉,以及 username 改成這樣 ```username=carlos```,改完就能送出 ![](https://i.imgur.com/Y4eEvzr.png) 回到 login,輸入 carlos 和重設的 passwd 就能登入啦 ![](https://i.imgur.com/feYmhCj.png)

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