Troubleshooting

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2020-5884)

• November 13, 2020
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 13 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5884 Related CVEs: CVE-2020-25284 CVE-2020-14314 CVE-2020-14385 CVE-2020-14386 CVE-2020-14356 CVE-2020-25212 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Configure Advanced Audit Policies on Windows Server 2012 R2

• November 13, 2020
• Tutorials
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How to Configure Advanced Audit Policies on Windows Server 2012 R2 Windows Server 2012 R2 provides a granular audit policy framework through Advanced Audit Policy Configuration that goes far beyond the nine basic categories available in the legacy audit settings. With advanced auditing, you can control exactly which events are logged for each of 58 […]

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Debian 9 — qtbase-opensource-src — multiple vulnerabilities (2 CVEs) — patch and remediation guide

• November 13, 2020
• Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 13 November 2020 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-15518 CVE-2020-0569 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How to Configure Storage Tiering with Storage Spaces on Windows Server 2019

• November 13, 2020
• Tutorials
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Introduction to Storage Tiering with Storage Spaces on Windows Server 2019 Storage Tiering in Windows Server 2019 allows a single Storage Space virtual disk to span multiple classes of physical drives — such as NVMe or SSD drives for a “Performance” tier and HDD drives for a “Capacity” tier. Windows automatically moves frequently accessed (hot) […]

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Oracle Linux 8 — .NET 6.0 security and bugfix update

• November 12, 2020
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 12 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-0826 Related CVEs: CVE-2022-24464 CVE-2022-24512 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Postfix Queue Backlog Causing Delayed Email Delivery

• November 12, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 12 November 2020 Affected versions: Debian 9 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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Ubuntu 14.04 LTS drops to grub rescue prompt on boot

• November 12, 2020
• Linux
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🔴 Critical   ⏱ 5–30 min  Last verified: 12 November 2020 Affected versions: 14.04 LTS 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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FreeBSD 12 — py36-wagtail — multiple vulnerabilities (3 CVEs) — patch and remediation guide

• November 12, 2020
• BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 12 November 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Wagtail — XSS vulnerability Related CVEs: CVE-2020-11001 CVE-2020-11037 CVE-2020-15118 Upstream summary: GitHub Advisory Database: When a form page type is made available to Wagtail editors through the wagtail.contrib.forms app, and […]

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Windows Server 2019 — WSUS WsusService crashes under SoftwareDistribution growth — Fix & Prevention

• November 12, 2020
• FreeBSD
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🟠 High   ⏱ 5–30 min  Last verified: 12 November 2020 Affected versions: Windows Server 2019 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution — Primary Fix Solution — Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]

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How to Set Up a Certificate Authority on Oracle Linux 8

• November 12, 2020
• Oracle Linux
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Introduction How to Set Up a Certificate Authority on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting […]

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