Описание
Scrapy versions up to 2.13.2 are vulnerable to a denial of service (DoS) attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of available memory. This occurs because brotli can achieve extremely high compression ratios for zero-filled data, leading to excessive memory consumption during decompression.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| python-scrapy | fixed | 2.13.4-1 | package |
Примечания
https://huntr.com/bounties/2c26a886-5984-47ee-a421-0d5fe1344eb0
Fixed by: https://github.com/scrapy/scrapy/commit/c44b8df6c7f8a6650c9655e271da2ba3a764fa15 (2.13.4)
To effectively mitigate the issue python-scrapy needs to use brotli >= 1.2.0
adding support for limiting output size in Python streaming decompression.
Support in brotli: https://bugs.debian.org/1122212
https://github.com/google/brotli/pull/1234
Negligible security impact
Связанные уязвимости
Scrapy versions up to 2.13.2 are vulnerable to a denial of service (DoS) attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of available memory. This occurs because brotli can achieve extremely high compression ratios for zero-filled data, leading to excessive memory consumption during decompression.
Scrapy versions up to 2.13.2 are vulnerable to a denial of service (DoS) attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of available memory. This occurs because brotli can achieve extremely high compression ratios for zero-filled data, leading to excessive memory consumption during decompression.
Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation
