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ALPINE-CVE-2018-20685
Vulnerability in dropbear (ALPINE-CVE-2018-20685)
Summary
vulnerability in dropbear (ALPINE-CVE-2018-20685). Data can be tampered with by attackers. Mitigation: upgrade to `2019.78-r1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **ALPINE-CVE-2018-20685** has been found in dropbear.
Data can be tampered with by attackers. CVSS score: ?/10.
What to do: upgrade dropbear to **2019.78-r1** or later.
If unsure, ask your IT team or search "dropbear ALPINE-CVE-2018-20685" on the vendor's site.
ALPINE-CVE-2018-20685 (dropbear) —
Attack vector: remote (network-reachable) / unauthenticated
Patched: `2019.78-r1` — 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 **2019.78-r1**.
🛡️ 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 2019.78-r1ステージング環境で 2019.78-r1 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
Alpine:v3.10
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2019.78-r1"}]}]
Alpine:v3.11
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2019.78-r1"}]}]
Alpine:v3.12
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2019.78-r1"}]}]
Alpine:v3.13
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.14
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.15
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.16
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.17
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.18
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.19
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.20
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.21
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.22
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.23
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.24
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.79-r0"}]}]
Alpine:v3.9
dropbear
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2018.76-r3"}]}]
Alpine:v3.10
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.11
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.12
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.13
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.14
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.15
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.16
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.17
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.18
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.19
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.20
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.21
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.22
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.23
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.24
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]
Alpine:v3.6
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.5_p1-r4"}]}]
Alpine:v3.7
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.5_p1-r10"}]}]
Alpine:v3.8
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.7_p1-r4"}]}]
Alpine:v3.9
openssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.9_p1-r3"}]}]