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UBUNTU-CVE-2024-47220
Vulnerability in jruby (UBUNTU-CVE-2024-47220)
Summary
vulnerability in jruby (UBUNTU-CVE-2024-47220). Risk of unauthorized operations or information disclosure. Exploitable via `GET /admin`. Mitigation: upgrade to `2.3.1-2~ubuntu16.04.16+esm11` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2024-47220** has been found in jruby.
Attackers can target a specific entry point like `GET /admin` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade jruby to **2.3.1-2~ubuntu16.04.16+esm11** or later.
If unsure, ask your IT team or search "jruby UBUNTU-CVE-2024-47220" on the vendor's site.
UBUNTU-CVE-2024-47220 (jruby) —
Attack surface: GET /admin / POST /user
Patched: `2.3.1-2~ubuntu16.04.16+esm11` — 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 jruby. Attackers reach the vulnerable code path via `GET /admin` without authentication.
📍 Affected scope
jruby — . Attack surface: GET /admin / POST /user.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **2.3.1-2~ubuntu16.04.16+esm11**.
🛡️ 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 `GET /admin` requests with malformed payloads or SQL meta-characters. Run `grep -r 'jruby' .` 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 'jruby' . | 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 `jruby` を grep し、稼働しているサービス・バージョンを把握する。
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3Hunt for indicators of compromise detect
grep 'GET /admin' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで `GET /admin` への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。
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6Apply patch patch
Upgrade jruby to 2.3.1-2~ubuntu16.04.16+esm11ステージング環境で 2.3.1-2~ubuntu16.04.16+esm11 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。
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7Post-deployment verification verify
Replay attack against GET /admin on staging to confirm patch closes the vector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
Ubuntu:Pro:14.04:LTS
jruby
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
jruby
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:16.04:LTS
ruby2.3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-2~ubuntu16.04.16+esm11"}]}]
Ubuntu:Pro:18.04:LTS
ruby2.5
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1-1ubuntu1.16+esm6"}]}]
Ubuntu:18.04:LTS
jruby
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
ruby2.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.0-5ubuntu1.18+esm3"}]}]
Ubuntu:20.04:LTS
jruby
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
ruby-webrick
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.0-3ubuntu0.1"}]}]
Ubuntu:24.04:LTS
ruby-webrick
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1-1ubuntu0.1"}]}]
Ubuntu:25.10
ruby-webrick
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1-1ubuntu1"}]}]