CVE-2025-61919— Rack 资源管理错误漏洞

Rack is vulnerable to a memory-exhaustion DoS through unbounded URL-encoded body parsing

Rack is a modular Ruby web server interface. Prior to versions 2.2.20, 3.1.18, and 3.2.3, `Rack::Request#POST` reads the entire request body into memory for `Content-Type: application/x-www-form-urlencoded`, calling `rack.input.read(nil)` without enforcing a length or cap. Large request bodies can therefore be buffered completely into process memory before parsing, leading to denial of service (DoS) through memory exhaustion. Users should upgrade to Rack version 2.2.20, 3.1.18, or 3.2.3, anu of which enforces form parameter limits using `query_parser.bytesize_limit`, preventing unbounded reads of `application/x-www-form-urlencoded` bodies. Additionally, enforce strict maximum body size at the proxy or web server layer (e.g., Nginx `client_max_body_size`, Apache `LimitRequestBody`).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

未加控制的资源消耗(资源穷尽)

Rack 资源管理错误漏洞

Rack是Rack开源的一个模块化的Ruby web服务器界面。 Rack 2.2.20之前版本、3.1.18之前版本和3.2.3之前版本存在资源管理错误漏洞，该漏洞源于Rack::Request POST在处理application/x-www-form-urlencoded内容类型时未限制请求体大小，可能导致内存耗尽型拒绝服务攻击。

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