Logging Monitoring

Gentoo Linux — app-admin/ansible — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-admin/ansible — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202006-11 Related CVEs: CVE-2020-10684 CVE-2020-10685 CVE-2020-1733 CVE-2020-1735 CVE-2020-1736 CVE-2020-1737 CVE-2020-1738 CVE-2020-1740  +1 more Upstream summary: Multiple vulnerabilities have been discovered in Ansible. Please review the CVE identifiers referenced below for details. Table […]

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

Oracle Linux 8 — dovecot — vulnerability — patch and remediation guide (ELSA-2020-2901)

🟠 High   ⏱ 15–60 min  Last verified: 6 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2901 Related CVEs: CVE-2020-10957 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 — libyang — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libyang — vulnerability — patch and remediation guide (ELSA-2019-4360)

🟠 High   ⏱ 15–60 min  Last verified: 6 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-4360 Related CVEs: CVE-2019-19334 CVE-2019-19333 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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Arch Linux — tcpreplay — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — tcpreplay — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201905-5 Related CVEs: CVE-2019-8381 CVE-2019-8377 CVE-2019-8376 CVE-2017-6429 CVE-2020-12740 Upstream summary: Type: multiple issues. Status: Fixed. Affected: 4.3.1-1. Fixed in: 4.3.2-1. Group: AVG-902. Table of contents Symptom & Impact Environment & […]

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Ubuntu 18.04 — libmediainfo — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libmediainfo — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 5 October 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5237-1 Related CVEs: CVE-2020-15395 CVE-2020-26797 CVE-2019-11372 CVE-2019-11373 Upstream summary: It was discovered that MediaInfoLib incorrectly handled certain specially crafted files. An attacker could possibly use this issue to cause a […]

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Oracle Linux 8 — dotnet3.1 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet3.1 security and bugfix update (ELSA-2021-0790)

🟠 High   ⏱ 15–60 min  Last verified: 5 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0790 Related CVEs: CVE-2021-26701 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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Common Problems 115129

NetworkManager connection missing after reboot – RHEL 8 Post 005

🟡 Medium   ⏱ 5–30 min  Last verified: 5 October 2020 📖 ~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 References & Further […]

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Common Problems 115093

RHEL 8 cockpit web console unreachable after certificate update

🟡 Medium   ⏱ 5–30 min  Last verified: 5 October 2020 📖 ~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 References & Further […]

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Common Problems 114927

firewalld Rule Added but Port Still Closed

🟡 Medium   ⏱ 5–30 min  Last verified: 5 October 2020 📖 ~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 References & Further […]

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Common Problems 113537

Windows Server 2012 R2 — Cumulative update fails because required Servicing Stack Update is missing — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 5 October 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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