Описание
Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, ``Rack::Multipart::Parserstores non-file form fields (parts without afilename) entirely in memory as Ruby Stringobjects. A single large text field in a multipart/form-data request (hundreds of megabytes or more) can consume equivalent process memory, potentially leading to out-of-memory (OOM) conditions and denial of service (DoS). Attackers can send large non-file fields to trigger excessive memory usage. Impact scales with request size and concurrency, potentially leading to worker crashes or severe garbage-collection overhead. All Rack applications processing multipart form submissions are affected. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a reasonable size cap for non-file fields (e.g., 2 MiB). Workarounds include restricting maximum request body size at the web-server or proxy layer (e.g., Nginxclient_max_body_size`) and validating and rejecting unusually large form fields a...
| Релиз | Статус | Примечание |
|---|---|---|
| devel | not-affected | 3.1.18-1 |
| esm-apps/bionic | ignored | changes too intrusive |
| esm-apps/focal | ignored | changes too intrusive |
| esm-apps/jammy | released | 2.1.4-5ubuntu1.2 |
| esm-apps/xenial | ignored | changes too intrusive |
| esm-infra-legacy/trusty | ignored | changes too intrusive |
| jammy | released | 2.1.4-5ubuntu1.2 |
| noble | released | 2.2.7-1ubuntu0.5 |
| plucky | ignored | end of life, was needed |
| questing | released | 3.1.16-0.1ubuntu0.1 |
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EPSS
7.5 High
CVSS3
Связанные уязвимости
Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, ``Rack::Multipart::Parser` stores non-file form fields (parts without a `filename`) entirely in memory as Ruby `String` objects. A single large text field in a multipart/form-data request (hundreds of megabytes or more) can consume equivalent process memory, potentially leading to out-of-memory (OOM) conditions and denial of service (DoS). Attackers can send large non-file fields to trigger excessive memory usage. Impact scales with request size and concurrency, potentially leading to worker crashes or severe garbage-collection overhead. All Rack applications processing multipart form submissions are affected. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a reasonable size cap for non-file fields (e.g., 2 MiB). Workarounds include restricting maximum request body size at the web-server or proxy layer (e.g., Nginx `client_max_body_size`) and validating and rejecting unusually large form fields at t
Rack is a modular Ruby web server interface. In versions prior to 2.2. ...
Rack: Multipart parser buffers large non‑file fields entirely in memory, enabling DoS (memory exhaustion)
Уязвимость класса Rack::Multipart::Parser модульного интерфейса между веб-серверами и веб-приложениями Rack, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
7.5 High
CVSS3