| タイトル | Telegram Telegram Desktop <= 6.7.5 NULL Pointer Dereference |
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| 説明 | A NULL pointer dereference vulnerability exists in Telegram Desktop versions up to 6.7.5. The vulnerability is located in the RequestButton() function in Telegram/SourceFiles/boxes/url_auth_box.cpp. When processing a login_url inline keyboard button, the function conditionally assigns the bot pointer to nullptr if the server response does not include a write access request. The bot pointer is subsequently dereferenced to access the firstName member (at offset 0x188 in UserData) without a prior null check, resulting in an access violation and immediate client crash. The vulnerability is remotely triggerable by any bot operator via the Telegram Bot API and requires only a single click from the victim. The issue was reported to the vendor on 2026-04-10. |
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| ソース | ⚠️ https://www.youtube.com/watch?v=xo9Bplsy1K8 |
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| ユーザー | oblivionsage (UID 97354) |
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| 送信 | 2026年04月14日 11:50 (2 月 ago) |
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| モデレーション | 2026年05月02日 22:31 (18 days later) |
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| ステータス | 承諾済み |
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| VulDBエントリ | 360870 [Telegram Desktop 迄 6.7.5 Bot API url_auth_box.cpp RequestButton login_url サービス拒否] |
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| ポイント | 17 |
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