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CVE-2020-1938
CISA KEV
high
【KEV】org.apache.tomcat.embed:tomcat-embed-core に 権限昇格 (CVE-2020-1938)
概要
org.apache.tomcat.embed:tomcat-embed-core に 脆弱性 (CVE-2020-1938) が存在。悪用されるとシステム全体を乗っ取られる可能性があります。CISA KEV登録済 — 実環境で悪用が確認されている。対策: `7.0.100` 以上に更新。
AI要約 snake-internal / snake-material-v2
org.apache.tomcat.embed:tomcat-embed-core という製品で、CVE-2020-1938 という番号がついた弱点 (脆弱性) が見つかりました。
悪用されるとシステム全体を乗っ取られる可能性があります。重要度は CVSS スコア ?/10 です。
※ この弱点は、CISA (アメリカの政府機関) が「すでに実際の攻撃で使われている」と公式に認定しています。普段より急いで対応すべきレベルです。
対策: org.apache.tomcat.embed:tomcat-embed-core を **7.0.100** 以上に更新してください。
心配なら、システム担当者や製品の公式サイトで「org.apache.tomcat.embed:tomcat-embed-core CVE-2020-1938」を検索してください。
CVE-2020-1938 (org.apache.tomcat.embed:tomcat-embed-core) — CWE-269 /
攻撃ベクター: ネットワーク経由 (リモート攻撃可) / 認証不要 / 被害者操作不要
修正バージョン: `7.0.100` (即時適用推奨)
CISA KEV登録済 — 既に実環境で悪用されているため最優先対応。
対応方針: 1) SBOMで影響バージョン横断確認, 2) ステージング検証→本番更新, 3) WAF/プロキシで該当エンドポイントを監視, 4) ログでIOC調査。
参考: 当ページの『参照URL』の GHSA / vendor advisory / patched release を参照。
❓ 何が問題か
org.apache.tomcat.embed:tomcat-embed-core に **脆弱性** (CWE-269) があります。
📍 影響範囲
org.apache.tomcat.embed:tomcat-embed-core のうち 。
🔥 重要度
重要度: 重要。悪用されるとシステム全体を乗っ取られる可能性があります **CISA KEV登録済** — 既に実環境で悪用が確認されているため最優先で対応すること。
🔧 修正方法
**7.0.100** に更新してください。
🛡️ 暫定回避
修正版が未提供時は、影響機能の無効化・WAFルール・ネットワークACLでの遮断を検討。
🔍 検知方法
Webサーバ・プロキシ・WAFログで該当CVEのIOCに合致する不審リクエストを検索。SBOM/依存ファイルで影響バージョンを横断確認。
対応アクション (7段階)
SOC/SREチームが順番に実行すべき具体的なステップとコマンド例
-
1影響範囲の特定 identify
grep -r 'org.apache.tomcat.embed:tomcat-embed-core' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `org.apache.tomcat.embed:tomcat-embed-core` を grep し、稼働しているサービス・バージョンを把握する。
-
4インシデント宣言検討 escalate
Notify SOC / on-callCISA KEV登録済 = 実環境で悪用が観測されている。Step 3 で兆候があればインシデント対応宣言、無くてもパッチ適用までWAF強化を最優先で。
-
6パッチ適用 patch
Upgrade org.apache.tomcat.embed:tomcat-embed-core to 7.0.100ステージング環境で 7.0.100 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
-
7事後検証 verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
影響パッケージ
Maven
org.apache.tomcat.embed:tomcat-embed-core
[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.0.100"}]}]
Bitnami
tomcat
[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.0.100"},{"introduced":"8.5.0"},{"fixed":"8.5.51"},{"introduced":"9.0.0"},{"fixed":"9.0.31"}]}]
参照URL
- advisory https://nvd.nist.gov/vuln/detail/CVE-2020-1938
- advisory https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2XFLQB3O5QVP4ZBIPVIXBEZV7F2R7ZMS/
- advisory https://security.netapp.com/advisory/ntap-20200226-0002/
- advisory https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3IPNHCKFVUKSHDTM45UL4Q765EHHTFG/
- advisory https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L46WJIV6UV3FWA5O5YEY6XLA73RYD53B/
- package https://github.com/apache/tomcat
- web https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1938
- web http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
- web http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00002.html
- web https://lists.apache.org/thread.html/r7c6f492fbd39af34a68681dbbba0468490ff1a97a1bd79c6a53610ef%40%3Cannounce.tomcat.apache.org%3E
- web https://lists.apache.org/thread.html/rf1bbc0ea4a9f014cf94df9a12a6477d24a27f52741dbc87f2fd52ff2%40%3Cissues.geode.apache.org%3E
- web https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
- web https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
- web https://www.debian.org/security/2020/dsa-4680
- web https://lists.apache.org/thread.html/r90890afea72a9571d666820b2fe5942a0a5f86be406fa31da3dd0922%40%3Cannounce.apache.org%3E
- web https://lists.apache.org/thread.html/ra7092f7492569b39b04ec0decf52628ba86c51f15efb38f5853e2760%40%3Cnotifications.ofbiz.apache.org%3E
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- web http://support.blackberry.com/kb/articleDetail?articleNumber=000062739
- web https://lists.apache.org/thread.html/rf992c5adf376294af31378a70aa8a158388a41d7039668821be28df3%40%3Ccommits.tomee.apache.org%3E
- web https://security.gentoo.org/glsa/202003-43
- web https://www.debian.org/security/2020/dsa-4673
- web https://lists.apache.org/thread.html/rd50baccd1bbb96c2327d5a8caa25a49692b3d68d96915bd1cfbb9f8b%40%3Cusers.tomcat.apache.org%3E
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- web https://www.oracle.com/security-alerts/cpuoct2020.html
- web https://lists.apache.org/thread.html/r9f119d9ce9239114022e13dbfe385b3de7c972f24f05d6dbd35c1a2f%40%3Cusers.tomcat.apache.org%3E
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- web https://www.oracle.com/security-alerts/cpujan2021.html
- web https://www.oracle.com/security-alerts/cpujul2020.html
- web https://lists.apache.org/thread.html/r1125f3044a0946d1e7e6f125a6170b58d413ebd4a95157e4608041c7%40%3Cannounce.apache.org%3E
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- web https://security.netapp.com/advisory/ntap-20200226-0002
- web https://lists.fedoraproject.org/archives/list/[email protected]/message/L46WJIV6UV3FWA5O5YEY6XLA73RYD53B
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