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DEBIAN-CVE-2023-48795
Vulnerability in dropbear (DEBIAN-CVE-2023-48795)
Summary
vulnerability in dropbear (DEBIAN-CVE-2023-48795). Data can be tampered with by attackers. Mitigation: upgrade to `2020.81-3+deb11u1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **DEBIAN-CVE-2023-48795** has been found in dropbear.
Data can be tampered with by attackers. CVSS score: ?/10.
What to do: upgrade dropbear to **2020.81-3+deb11u1** or later.
If unsure, ask your IT team or search "dropbear DEBIAN-CVE-2023-48795" on the vendor's site.
DEBIAN-CVE-2023-48795 (dropbear) —
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `2020.81-3+deb11u1` — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (unclassified) exists in dropbear.
📍 Affected scope
dropbear — .
🔥 Severity
Severity: ?. Data can be tampered with by attackers
🔧 How to fix
Update to **2020.81-3+deb11u1**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'dropbear' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify 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。
-
6Apply 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。
-
7Post-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。
Affected packages
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"}]}]