Troubleshooting

FreeBSD 12 — openldap24-server — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — openldap24-server — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 January 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: nested filters leads to stack overflow Related CVEs: CVE-2020-12243 Upstream summary: Howard Chu reports: nested filters leads to stack overflow Table of contents Symptom & Impact Environment & Reproduction Root […]

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How to Set Up STONITH for Cluster Fencing on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up STONITH for Cluster Fencing on Oracle Linux 8

Introduction Setting up set up stonith for cluster fencing on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up STONITH for Cluster Fencing on Oracle Linux 8, with all the commands you need, the SELinux […]

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Ubuntu 18.04 — tomcat7 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — tomcat7 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 18 January 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6908-1 Related CVEs: CVE-2019-0221 CVE-2020-9484 CVE-2021-25329 Upstream summary: It was discovered that the Tomcat SSI printenv command echoed user provided data without escaping it. An attacker could possibly use this […]

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Oracle Linux 8 — openjpeg2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — openjpeg2 — vulnerability — patch and remediation guide (ELSA-2020-0570)

🟠 High   ⏱ 15–60 min  Last verified: 18 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0570 Related CVEs: CVE-2020-8112 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Oracle Linux 8 — webkit2gtk3 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — webkit2gtk3 — security and stability fixes — required update (ELSA-2021-4097)

🟡 Medium   ⏱ 10–30 min  Last verified: 17 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4097 Related CVEs: CVE-2021-30858 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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openSUSE Tumbleweed — python38-distributed — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python38-distributed — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2021-42343 Upstream summary: An issue was discovered in the Dask distributed package before 2021.10.0 for Python. Single machine Dask clusters started with dask.distributed.LocalCluster or dask.distributed.Client […]

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Common Problems 117584

MySQL Fails to Start with InnoDB Corruption

🔴 Critical   ⏱ 5–30 min  Last verified: 17 January 2021 Affected versions: 20.04 📖 ~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 & Cross-Refs […]

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FreeBSD 12 — halibut — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — halibut — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 17 January 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: halibut — Segmentation fault, denial of service or possibly other unspecified impact via a crafted text document Related CVEs: CVE-2021-42612 CVE-2021-42613 CVE-2021-42614 Upstream summary: [email protected] reports: CVE-2021-42612: A use after […]

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How to Configure AlertManager on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure AlertManager on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure AlertManager on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with the default AppStream […]

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FreeBSD 12 — crispy-doom — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — crispy-doom — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 January 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: chocolate-doom — Arbitrary code execution Related CVEs: CVE-2020-14983 Upstream summary: Michal Dardas from LogicalTrust reports: The server in Chocolate Doom 3.0.0 and Crispy Doom 5.8.0 doesn't validate the user-controlled num_players […]

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