Vulnerability in linux-oem-5.6 (USN-4912-1)

Summary

vulnerability in linux-oem-5.6 (USN-4912-1). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `5.6.0-1053.57` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **USN-4912-1** has been found in linux-oem-5.6. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade linux-oem-5.6 to **5.6.0-1053.57** or later. If unsure, ask your IT team or search "linux-oem-5.6 USN-4912-1" on the vendor's site.

USN-4912-1 (linux-oem-5.6) — Patched: `5.6.0-1053.57` — 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 linux-oem-5.6.

📍 Affected scope

linux-oem-5.6 — .

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **5.6.0-1053.57**.

🛡️ 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 'linux-oem-5.6' .` 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

1
Identify exposure identify
```
grep -r 'linux-oem-5.6' . | 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 `linux-oem-5.6` 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 linux-oem-5.6 to 5.6.0-1053.57
```
ステージング環境で 5.6.0-1053.57 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。

Affected packages

Ubuntu:20.04:LTS linux-oem-5.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.0-1053.57"}]}]

References

advisory https://ubuntu.com/security/notices/USN-4912-1
report https://ubuntu.com/security/CVE-2021-3411
report https://ubuntu.com/security/CVE-2020-0423
report https://ubuntu.com/security/CVE-2020-0465
report https://ubuntu.com/security/CVE-2020-0466
report https://ubuntu.com/security/CVE-2020-14351
report https://ubuntu.com/security/CVE-2020-14390
report https://ubuntu.com/security/CVE-2020-25285
report https://ubuntu.com/security/CVE-2020-25645
report https://ubuntu.com/security/CVE-2020-25669
report https://ubuntu.com/security/CVE-2020-27830
report https://ubuntu.com/security/CVE-2020-36158
report https://ubuntu.com/security/CVE-2021-3178
report https://ubuntu.com/security/CVE-2021-20194
report https://ubuntu.com/security/CVE-2021-29154