Security Hardening

How to Configure iSCSI Storage on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure iSCSI Storage on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure iscsi storage on ibm aix 7.2 on IBM […]

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

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2020-0577)

🟠 High   ⏱ 15–60 min  Last verified: 19 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0577 Related CVEs: CVE-2020-6792 CVE-2020-6793 CVE-2020-6798 CVE-2020-6795 CVE-2020-6794 CVE-2020-6800 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 Set Up a Flask Application on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up a Flask Application on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up a flask application on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up a Flask Application on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the […]

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Debian 9 — spamassassin — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — spamassassin — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 December 2020 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-11805 CVE-2020-1930 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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openSUSE Tumbleweed — claws-mail — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — claws-mail — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:1116-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-15917 CVE-2012-4507 CVE-2015-8614 CVE-2015-8708 Upstream summary: common/session.c in Claws Mail before 3.17.6 has a protocol violation because suffix data after STARTTLS is mishandled. Table of […]

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How to Install Kubernetes with kubeadm on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Kubernetes with kubeadm on RHEL 7

How to Install Kubernetes with kubeadm on RHEL 7 Kubernetes is the industry-standard container orchestration platform, enabling you to automate deployment, scaling, and management of containerized applications across a cluster of machines. On Red Hat Enterprise Linux 7, setting up a production-grade Kubernetes cluster using kubeadm is the recommended approach. This tutorial walks through every […]

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Oracle Linux 8 — container-tools:ol8 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — container-tools:ol8 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-1762)

🟠 High   ⏱ 15–60 min  Last verified: 18 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1762 Related CVEs: CVE-2022-21698 CVE-2022-27651 CVE-2022-1227 CVE-2022-27649 CVE-2022-27650 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Ubuntu 20.04 — crmsh — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — crmsh — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 December 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6711-1 Related CVEs: CVE-2020-35459 Upstream summary: Vincent Berg discovered that CRM shell incorrectly handled certain commands. An local attacker could possibly use this issue to execute arbitrary code via shell […]

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Common Problems 117469

Ubuntu 20.04 snap apps fail to launch

🟡 Medium   ⏱ 5–30 min  Last verified: 18 December 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 115572

yum SSL certificate validation fails

🟡 Medium   ⏱ 5–30 min  Last verified: 18 December 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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