GHSA-hrqr-hxpp-chr3 · 深刻度： medium · エコシステム： rubygems — Possible Information Leak / Session Hijack Vulnerability in Rack
There's a possible information leak / session hijack vulnerability in Rack (RubyGem rack). This vulnerability is patched in versions 1.6.12 and 2.0.8. Attackers may be able to find and hijack sessions by using timing attacks targeting the session id. Session ids are usually stored and indexed in a database that uses some kind of scheme for speeding up lookups of that session id. By carefully measuring the amount of time it takes to look up a session, an attacker may be able to find a valid session id and hijack the session. The session id itself may be generated randomly, but the way the session is indexed by the backing store does not use a secure comparison.
総合評価: CVE-2019-16782 は中リスク（58.9/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 3.69%、88 パーセンタイル） 根拠: 直近 1 日で EPSS が +2.79% 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 | 0.89% | 3.69% | +2.79% |
| 2 | 2026-04-20 | 1.25% | 0.89% | -0.36% |
| 3 | 2026-03-26 | — | 1.25% | — |
EPSS の全履歴 （全 46 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 |
|---|---|---|---|---|---|---|
| 6.3 | 3.1 | MEDIUM |
|
1.8 | 4.0 | [email protected] |
| 5.9 | 3.1 | MEDIUM |
|
2.2 | 3.6 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
GHSA-hrqr-hxpp-chr3 · 深刻度： medium · エコシステム： rubygems — Possible Information Leak / Session Hijack Vulnerability in Rack
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2019-16782 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-2019-16782 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2019-16782 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2019-16782/ |
ubuntu
|
medium | CVE-2019-16782 medium priority: Ubuntu including 1 source packages (ruby-rack), 17 status rows across 17 suites (bionic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): not-affected 10, released 5, ignored 2. | https://ubuntu.com/security/CVE-2019-16782 |
| URL | タグ |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00016.html | Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2019/12/18/2 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2019/12/18/3 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2019/12/19/3 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2020/04/08/1 | Mailing List Patch Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2020/04/09/2 | Mailing List Third Party Advisory |
| https://github.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38 | Patch Third Party Advisory |
| https://github.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3 | Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZXMWILCICQLA2BYSP6I2CRMUG53YBLX/ |