GHSA-w64w-qqph-5gxm · 深刻度： medium · エコシステム： rubygems — HTTP Smuggling via Transfer-Encoding Header in Puma
In Puma (RubyGem) before 4.3.5 and 3.12.6, a client could smuggle a request through a proxy, causing the proxy to send a response back to another unknown client. If the proxy uses persistent connections and the client adds another request in via HTTP pipelining, the proxy may mistake it as the first request's body. Puma, however, would see it as two requests, and when processing the second request, send back a response that the proxy does not expect. If the proxy has reused the persistent connection to Puma to send another request for a different client, the second response from the first client will be sent to the second client. This is a similar but different vulnerability from CVE-2020-11076. The problem has been fixed in Puma 3.12.6 and Puma 4.3.5.
総合評価: CVE-2020-11077 は中リスク（58.8/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 2.81%、85 パーセンタイル） 根拠: 直近 1 日で EPSS が +1.98% 上昇。悪用への関心が高まっている可能性があります。 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 | 2026-06-15 | 0.82% | 2.81% | +1.98% |
| 2 | 2026-03-04 | 0.49% | 0.82% | +0.33% |
| 3 | 2026-03-01 | — | 0.49% | — |
EPSS の全履歴 （全 44 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 |
|---|---|---|---|---|---|---|
| 6.8 | 3.1 | MEDIUM |
|
2.2 | 4.0 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
GHSA-w64w-qqph-5gxm · 深刻度： medium · エコシステム： rubygems — HTTP Smuggling via Transfer-Encoding Header in Puma
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2020-11077 not yet assigned priority: Debian including 1 source packages (puma), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2020-11077 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2020-11077 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2020-11077/ |
ubuntu
|
medium | CVE-2020-11077 medium priority: Ubuntu including 1 source packages (puma), 16 status rows across 16 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): not-affected 7, ignored 4, DNE 3, needs-triage 1, released 1. | https://ubuntu.com/security/CVE-2020-11077 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| puma | puma | >= 3.0.0, < 3.12.6 | cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:* |
| puma | puma | >= 4.0.0, < 4.3.5 | cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| opensuse | leap | 15.2 | cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00034.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00038.html | Mailing List Third Party Advisory |
| https://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05-22 | Release Notes |
| https://github.com/puma/puma/security/advisories/GHSA-w64w-qqph-5gxm | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2020/10/msg00009.html | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKIY5H67GJIGJL6SMFWFLUQQQR3EMVPR/ |