← Back

UBUNTU-CVE-2019-11091

Vulnerability in intel-microcode (UBUNTU-CVE-2019-11091)

Summary

vulnerability in intel-microcode (UBUNTU-CVE-2019-11091). Confidential information can be exposed externally. Mitigation: upgrade to `3.20190514.0ubuntu0.14.04.1` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **UBUNTU-CVE-2019-11091** has been found in intel-microcode. Confidential information can be exposed externally. CVSS score: ?/10. What to do: upgrade intel-microcode to **3.20190514.0ubuntu0.14.04.1** or later. If unsure, ask your IT team or search "intel-microcode UBUNTU-CVE-2019-11091" on the vendor's site.

UBUNTU-CVE-2019-11091 (intel-microcode) — Attack vector: local / no user interaction Patched: `3.20190514.0ubuntu0.14.04.1` — 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 intel-microcode.

📍 Affected scope

intel-microcode — .

🔥 Severity

Severity: ?. Confidential information can be exposed externally

🔧 How to fix

Update to **3.20190514.0ubuntu0.14.04.1**.

🛡️ 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 'intel-microcode' .` 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 'intel-microcode' . | 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 `intel-microcode` 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 intel-microcode to 3.20190514.0ubuntu0.14.04.1
```
ステージング環境で 3.20190514.0ubuntu0.14.04.1 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:14.04:LTS intel-microcode

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20190514.0ubuntu0.14.04.1"}]}]

Ubuntu:14.04:LTS libvirt

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.2-0ubuntu13.1.28"}]}]

Ubuntu:14.04:LTS linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.0-170.220"}]}]

Ubuntu:14.04:LTS linux-aws

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1044.47"}]}]

Ubuntu:14.04:LTS linux-azure

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1045.49~14.04.1"}]}]

Ubuntu:14.04:LTS linux-lts-xenial

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-148.174~14.04.1"}]}]

Ubuntu:14.04:LTS qemu

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0+dfsg-2ubuntu1.46"}]}]

Ubuntu:16.04:LTS intel-microcode

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20190514.0ubuntu0.16.04.1"}]}]

Ubuntu:16.04:LTS libvirt

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.1-1ubuntu10.26"}]}]

Ubuntu:16.04:LTS linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-148.174"}]}]

Ubuntu:16.04:LTS linux-aws

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1083.93"}]}]

Ubuntu:16.04:LTS linux-aws-hwe

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1039.41~16.04.1"}]}]

Ubuntu:16.04:LTS linux-azure

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1045.49"}]}]

Ubuntu:16.04:LTS linux-gcp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1032.34~16.04.1"}]}]

Ubuntu:16.04:LTS linux-hwe

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-50.54~16.04.1"}]}]

Ubuntu:16.04:LTS linux-kvm

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1046.52"}]}]

Ubuntu:16.04:LTS linux-oracle

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1013.15~16.04.1"}]}]

Ubuntu:16.04:LTS linux-raspi2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1109.117"}]}]

Ubuntu:16.04:LTS linux-snapdragon

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1113.118"}]}]

Ubuntu:16.04:LTS qemu

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.5+dfsg-5ubuntu10.38"}]}]

Ubuntu:Pro:FIPS:16.04:LTS linux-fips

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1010.13"}]}]

Ubuntu:18.04:LTS intel-microcode

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20190514.0ubuntu0.18.04.2"}]}]

Ubuntu:18.04:LTS libvirt

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.0-1ubuntu8.10"}]}]

Ubuntu:18.04:LTS linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-50.54"}]}]

Ubuntu:18.04:LTS linux-aws

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1039.41"}]}]

Ubuntu:18.04:LTS linux-azure

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-1018.18~18.04.1"}]}]

Ubuntu:18.04:LTS linux-gcp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1032.34"}]}]

Ubuntu:18.04:LTS linux-gke-4.15

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1032.34"}]}]

Ubuntu:18.04:LTS linux-hwe

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-20.21~18.04.1"}]}]

Ubuntu:18.04:LTS linux-kvm

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1034.34"}]}]

Ubuntu:18.04:LTS linux-oem

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1038.43"}]}]

Ubuntu:18.04:LTS linux-oracle

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1013.15"}]}]

Ubuntu:18.04:LTS linux-raspi2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1036.38"}]}]

Ubuntu:18.04:LTS linux-snapdragon

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1053.57"}]}]

Ubuntu:18.04:LTS qemu

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.11+dfsg-1ubuntu7.13"}]}]

Ubuntu:Pro:20.04:LTS linux-azure-fde-5.15