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DEBIAN-CVE-2023-48795
dropbear の脆弱性 (DEBIAN-CVE-2023-48795)
概要
dropbear に 脆弱性 (DEBIAN-CVE-2023-48795) が存在。データの不正な改ざんを許す可能性があります。対策: `2020.81-3+deb11u1` 以上に更新。
AI要約 snake-internal / snake-material-v2
dropbear という製品で、DEBIAN-CVE-2023-48795 という番号がついた弱点 (脆弱性) が見つかりました。
データの不正な改ざんを許す可能性があります。重要度は CVSS スコア ?/10 です。
対策: dropbear を **2020.81-3+deb11u1** 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「dropbear DEBIAN-CVE-2023-48795」を検索してください。
DEBIAN-CVE-2023-48795 (dropbear) —
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: `2020.81-3+deb11u1` (即時適用推奨)
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
dropbear に **脆弱性** (分類未定) があります。
📍 影響範囲
dropbear のうち 。
🔥 重要度
重要度: ?。データの不正な改ざんを許す可能性があります
🔧 修正方法
**2020.81-3+deb11u1** 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 'dropbear' . | 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 `dropbear` を grep し、稼働しているサービス・バージョンを把握する。
-
6パッチ適用 patch
Upgrade dropbear to 2020.81-3+deb11u1ステージング環境で 2020.81-3+deb11u1 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
Debian:11
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.81-3+deb11u1"}]}]
Debian:12
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.83-1+deb12u1"}]}]
Debian:13
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.83-4"}]}]
Debian:14
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.83-4"}]}]
Debian:11
erlang
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:23.2.6+dfsg-1+deb11u2"}]}]
Debian:12
erlang
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:25.2.3+dfsg-1+deb12u1"}]}]
Debian:13
erlang
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:25.3.2.8+dfsg-1"}]}]
Debian:14
erlang
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:25.3.2.8+dfsg-1"}]}]
Debian:11
filezilla
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.52.2-3+deb11u1"}]}]
Debian:12
filezilla
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.63.0-1+deb12u3"}]}]
Debian:13
filezilla
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.66.4-1"}]}]
Debian:14
filezilla
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.66.4-1"}]}]
Debian:11
golang-go.crypto
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
golang-go.crypto
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
golang-go.crypto
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.17.0-1"}]}]
Debian:14
golang-go.crypto
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.17.0-1"}]}]
Debian:11
libssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.8-0+deb11u1"}]}]
Debian:12
libssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.6-0+deb12u1"}]}]
Debian:13
libssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.6-1"}]}]
Debian:14
libssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.6-1"}]}]
Debian:13
libssh2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.0-4"}]}]
Debian:14
libssh2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.0-4"}]}]
Debian:11
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:8.4p1-5+deb11u3"}]}]
Debian:12
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.2p1-2+deb12u2"}]}]
Debian:13
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.6p1-1"}]}]
Debian:14
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.6p1-1"}]}]
Debian:11
paramiko
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
paramiko
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
paramiko
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.0-1"}]}]
Debian:14
paramiko
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.0-1"}]}]
Debian:11
php-phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.30-2+deb11u1"}]}]
Debian:12
php-phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.42-1+deb12u1"}]}]
Debian:13
php-phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.46-1"}]}]
Debian:12
php-phpseclib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.19-1+deb12u2"}]}]
Debian:13
php-phpseclib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.35-1"}]}]
Debian:11
phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.19-3+deb11u1"}]}]
Debian:12
phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.20-1+deb12u1"}]}]
Debian:13
phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.22-1"}]}]
Debian:11
proftpd-dfsg
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.7a+dfsg-12+deb11u3"}]}]
Debian:12
proftpd-dfsg
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.8+dfsg-4+deb12u3"}]}]
Debian:13
proftpd-dfsg
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.8.b+dfsg-1"}]}]
Debian:14
proftpd-dfsg
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.8.b+dfsg-1"}]}]
Debian:11
proftpd-mod-proxy
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
proftpd-mod-proxy
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.2-1+deb12u1"}]}]
Debian:13
proftpd-mod-proxy
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.3-1"}]}]
Debian:14
proftpd-mod-proxy
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.3-1"}]}]
Debian:11
putty
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.74-1+deb11u1"}]}]
Debian:12
putty
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.78-2+deb12u1"}]}]
Debian:13
putty
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.80-1"}]}]
Debian:14
putty
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.80-1"}]}]
Debian:11
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.0-0.1+deb11u1"}]}]
Debian:12
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.1-2+deb12u1"}]}]
Debian:13
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.15.0-1"}]}]
Debian:14
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.15.0-1"}]}]
Debian:11
tinyssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
tinyssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
tinyssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20230101-4"}]}]
Debian:14
tinyssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20230101-4"}]}]
Debian:11
trilead-ssh2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
trilead-ssh2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
trilead-ssh2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
trilead-ssh2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
php-phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.46-1"}]}]
Debian:14
php-phpseclib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.35-1"}]}]