GHSA-wpv5-97wm-hp9c · 深刻度： high · エコシステム： rubygems — Rack's multipart parser buffers unbounded per-part headers, enabling DoS (memory exhaustion)
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` can accumulate unbounded data when a multipart part’s header block never terminates with the required blank line (`CRLFCRLF`). The parser keeps appending incoming bytes to memory without a size cap, allowing a remote attacker to exhaust memory and cause a denial of service (DoS). Attackers can send incomplete multipart headers to trigger high memory use, leading to process termination (OOM) or severe slowdown. The effect scales with request size limits and concurrency. All applications handling multipart uploads may be affected. Versions 2.2.19, 3.1.17, and 3.2.2 cap per-part header size (e.g., 64 KiB). As a workaround, restrict maximum request sizes at the proxy or web server layer (e.g., Nginx `client_max_body_size`).
総合評価: CVE-2025-61772 は中リスク（49/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.87%、54 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-07-03 | 0.85% | 0.87% | +0.02% |
| 2 | 2026-06-15 | 0.36% | 0.85% | +0.49% |
| 3 | 2026-06-12 | — | 0.36% | — |
EPSS の全履歴 （全 9 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-wpv5-97wm-hp9c · 深刻度： high · エコシステム： rubygems — Rack's multipart parser buffers unbounded per-part headers, enabling DoS (memory exhaustion)
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2025-61772 not yet assigned priority: Debian including 1 source packages (ruby-rack), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2025-61772 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-61772 |
suse
|
high | CVE-2025-61772 severity important: SUSE including 10 source package names (pcs-0.10.18-2.el8_10.7, pcs-0.11.9-2.el9_6.2, …), 10 product×package rows across 4 product lines (SUSE Liberty Linux 8, SUSE Liberty Linux 9, openSUSE Leap 15.6, openSUSE Tumbleweed): Fixed 6, Known Not Affected 4. | https://www.suse.com/security/cve/CVE-2025-61772/ |
ubuntu
|
medium | CVE-2025-61772 medium priority: Ubuntu including 1 source packages (ruby-rack), 9 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): ignored 5, released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2025-61772 |