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DEBIAN-CVE-2023-48795

Vulnérabilité dans dropbear (DEBIAN-CVE-2023-48795)

Résumé

vulnérabilité dans dropbear (DEBIAN-CVE-2023-48795). Les données peuvent être altérées par des attaquants. Atténuation : mise à jour vers `2020.81-3+deb11u1` ou plus.

Résumé IA snake-internal / snake-material-v2

Une vulnérabilité référencée **DEBIAN-CVE-2023-48795** a été découverte dans dropbear. Les données peuvent être altérées par des attaquants. Score CVSS : ?/10. Action : mettez à jour dropbear vers **2020.81-3+deb11u1** ou supérieur. En cas de doute, contactez votre service informatique ou cherchez « dropbear DEBIAN-CVE-2023-48795 » sur le site de l'éditeur.

DEBIAN-CVE-2023-48795 (dropbear) — Vecteur d'attaque : distant (réseau) / non authentifié / sans interaction utilisateur Correctif : `2020.81-3+deb11u1` — appliquer immédiatement Plan : 1) Audit SBOM, 2) Mise à jour staging→prod, 3) Surveillance WAF/proxy sur les endpoints affectés, 4) Recherche d'IOC dans les logs. Réfs : voir GHSA / avis éditeur / version corrigée liés sur cette page.

❓ Quel est le problème

Une **vulnérabilité** (non classée) affecte dropbear.

📍 Périmètre concerné

dropbear — .

🔥 Gravité

Gravité : ?. Les données peuvent être altérées par des attaquants

🔧 Comment corriger

Mettre à jour vers **2020.81-3+deb11u1**.

🛡️ Contournement

En attendant le correctif : désactivez la fonctionnalité concernée, appliquez des règles WAF, ou restreignez l'accès par ACL réseau.

🔍 Détection

Recherchez dans les logs des requêtes correspondant aux IOC connus de cette CVE. Auditez les SBOM/dépendances.

Actions de réponse (7 étapes)

Étapes concrètes et exemples de commandes que les équipes SOC/SRE doivent exécuter dans l'ordre

1
Identify exposure 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
Apply patch 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
Post-deployment verification 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。

Paquets affectés

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"}]}]

Références

advisory https://security-tracker.debian.org/tracker/CVE-2023-48795

Résumé

Résumé IA snake-internal / snake-material-v2

Actions de réponse (7 étapes)

Paquets affectés

Références

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