#уязвимость дня @Будни разработчика

Будни разработчика | United States America (US)

Create: 2025-03-23 Update: 2025-07-06 22:03:10

#уязвимость дня

Итак, Next.js обосрался. Гремит уже пару дней точно: https://nextjs.org/blog/cve-2025-29927

И уязвимость, если коротко, заключается в следующем: сформировав определённый заголовок, можно пропустить все проверки аутентификации пользователя и выполнить нужный код.

x-middleware-subrequest: middleware

Если значение этого заголовка содержит имя middleware (middlewareInfo.name), то выполнение данного middleware пропускается.

Естественно, должно сойтись несколько условий, например — аутентификация должна проходить в middleware, который мы и можем пропустить. Скриншот очень хорошо показывает суть проблемы.

Так вот, за подробностями-то можете сходить сюда: https://zhero-web-sec.github.io/research-and-things/nextjs-and-the-corrupt-middleware, но вот что очень интересно.

А интересно это:


2025-02-27T06:03Z: Disclosure to Next.js team via GitHub private vulnerability reporting
2025-03-14T17:13Z: Next.js team started triaging the report
2025-03-14T19:08Z: Patch pushed for Next.js 15.x

Две недели! Две недели компания Vercel игнорировала проблему. Да, разные инфлюенсеры, вроде известного Th3o, утверждают, что ни один сайт не был подвержен уязвимости... ну да, а ещё он в Vercel инвестировал.

Очевидно, что уязвимость эта — типичный бэкдор облачно-ориентированной компании для упрощения своих конкретных задач. Но легче от этого не становится.

А, ну и да, официальная рекомендация:

We recommend that all self-hosted Next.js deployments using next start and output: 'standalone' should update immediately.

А остальным — закройте этот заголовок.

#nextjs #vulnerability

Будни разработчика


2025-02-27T06:03Z: Disclosure to Next.js team via GitHub private vulnerability reporting
2025-03-14T17:13Z: Next.js team started triaging the report
2025-03-14T19:08Z: Patch pushed for Next.js 15.x

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3.1K viewsSergey Bekharsky, Mar 23 at 16:06

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