Logging Monitoring

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

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2021-2570)

🟠 High   ⏱ 15–60 min  Last verified: 6 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2570 Related CVEs: CVE-2020-26541 CVE-2021-33034 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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Common Problems 113102

Windows Server 2016 — SMB signing and encryption policy mismatch causes file service latency spikes — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 December 2020 Affected versions: Windows Server 2016 📖 ~2 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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Common Problems 113073

Windows Server 2016 — DFS Replication service backlog growth and stalls — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 December 2020 Affected versions: Windows Server 2016 📖 ~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 Configure DRBD for High Availability on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure DRBD for High Availability on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure DRBD for High Availability 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 […]

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Ubuntu 16.04 — ppp — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — ppp — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 6 December 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4451-1 Related CVEs: CVE-2020-15704 CVE-2020-8597 CVE-2018-11574 Upstream summary: Thomas Chauchefoin working with Trend Micro´s Zero Day Initiative, discovered that ppp incorrectly handled module loading. A local attacker could use this […]

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openSUSE Tumbleweed — libEMF1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libEMF1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:0831-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-11865 CVE-2020-11863 CVE-2020-13999 Upstream summary: libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows out-of-bounds memory access. Table of contents Symptom & Impact Environment & Reproduction […]

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SLES 15 — perl-DBI — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — perl-DBI — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 6 December 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:14510-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-20919 CVE-2020-14392 CVE-2020-14393 CVE-2014-10401 CVE-2014-10402 Upstream summary: An issue was discovered in the DBI module before 1.643 for Perl. The hv_fetch() documentation requires checking for […]

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Oracle Linux 8 — flatpak-builder — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — flatpak-builder — security and stability fixes — required update (ELSA-2022-7458)

🟡 Medium   ⏱ 10–30 min  Last verified: 5 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7458 Related CVEs: CVE-2022-21682 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 118128

Ubuntu 18.04 LTS Cron Jobs Stop Running Due to PAM or Permission Changes

🟡 Medium   ⏱ 5–30 min  Last verified: 5 December 2020 Affected versions: 18.04 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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Common Problems 117406

Ubuntu 20.04 LTS – unattended-upgrades causes sustained CPU usage – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 5 December 2020 Affected versions: Ubuntu 20.04 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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