CVE-2025-61770
ruby-rack - security update
描述
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` buffers the entire multipart preamble (bytes before the first boundary) in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing significant memory use and potential process termination due to out-of-memory (OOM) conditions. Remote attackers can trigger large transient memory spikes by including a long preamble in multipart/form-data requests. The impact scales with allowed request sizes and concurrency, potentially causing worker crashes or severe slowdown due to garbage collection. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a preamble size limit (e.g., 16 KiB) or discard preamble data entirely. Workarounds include limiting total request body size at the proxy or web server level and monitoring memory and set per-process limits to prevent OOM conditions.
如何修補 CVE-2025-61770
要修補 CVE-2025-61770,請將受影響套件升級到下列已修補版本。
- —升級至 2.1.4-3+deb11u4 或更新版本
- —升級至 2.2.20-0+deb12u1 或更新版本
- —升級至 2.2.19 或更新版本
CVE-2025-61770 正在被利用嗎?
低 — EPSS 為 0.9%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0, < 2.1.4-3+deb11u4
- from 0, < 2.2.20-0+deb12u1
- from 0, < 2.2.19
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |