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CVE-2019-11091 medium CVSS 5.6

Vulnerability in Intel Microarchitectural Data Sampling Uncacheable Memory Firmware (CVE-2019-11091)

Summary

Vulnerability in Intel Microarchitectural Data Sampling Uncacheable Memory Firmware (CVE-2019-11091). Confidential information can be exposed externally.

Original description

The description as published by the source.

Microarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf

Source: NIST National Vulnerability Database NVD

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2019-11091 has been found in Intel Microarchitectural Data Sampling Uncacheable Memory Firmware.
Confidential information can be exposed externally. CVSS score: 5.6/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Intel Microarchitectural Data Sampling Uncacheable Memory Firmware CVE-2019-11091" on the vendor's site.

CVE-2019-11091 (Intel Microarchitectural Data Sampling Uncacheable Memory Firmware) — CVSS v3 5.6
Attack vector: local / no user interaction
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 Microarchitectural Data Sampling Uncacheable Memory Firmware.

📍 Affected scope

Check the vendor advisory for the affected versions of Intel Microarchitectural Data Sampling Uncacheable Memory Firmware.

🔥 Severity

Severity: Medium (CVSS 5.6/10). Confidential information can be exposed externally.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ 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. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで Intel Microarchitectural Data Sampling Uncacheable Memory Firmware を使っているサービスとバージョンを洗い出す。

  2. 2
    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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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