Описание
ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| modsecurity | fixed | 3.0.6-1 | package | |
| modsecurity | no-dsa | bullseye | package | |
| modsecurity | no-dsa | buster | package | |
| modsecurity-apache | fixed | 2.9.5-1 | package |
Примечания
https://github.com/SpiderLabs/ModSecurity/issues/2647
https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-cve-2021-42717/
Fixed by: https://github.com/SpiderLabs/ModSecurity/commit/41918335fa4c74fba46a986771a5a6cb457070c4 (v2.9.5)
Fixed by: https://github.com/SpiderLabs/ModSecurity/commit/ac79c1c29b7e6323e26cc984ad4f76ef62c731cd (v3.0.6)
Связанные уязвимости
ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.
ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.
ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.
Уязвимость модуля Apache для усиления безопасности веб-приложений modsecurity-apache, связанная с ошибками при обработке JSON-объектов, позволяющая нарушителю вызвать отказ в обслуживании
ALT-PU-2021-3328: package `modsecurity` update to version 3.0.6-alt1