Security Hardening

How to Configure IPv6 Networking on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure IPv6 Networking on Debian 13

Introduction How to Configure IPv6 Networking on Debian 13 is a fundamental operation for any administrator maintaining a Debian 13 Trixie server. Debian 13 Trixie ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. This […]

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Alpine Linux 3.20 — procps-ng — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — procps-ng — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 4.0.4-r0 📖 ~4 min read  •  Source: Alpine secdb entry — procps-ng 4.0.4-r0 Related CVEs: CVE-2023-4016 Upstream summary: Alpine main repository for vv3.20 ships procps-ng 4.0.4-r0 which addresses CVE-2023-4016. Table of contents Symptom & Impact Environment […]

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How to Perform a System Security Audit with auditd on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Perform a System Security Audit with auditd on RHEL 9

Security auditing is the practice of recording and reviewing system calls, file accesses, user actions, and configuration changes to detect policy violations, investigate incidents, and demonstrate compliance with standards like PCI DSS, HIPAA, and SOC 2. On RHEL 9, the Linux Audit Framework — provided by the auditd daemon — captures events at the kernel […]

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Debian 13 — dvipng — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — dvipng — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-0829 Upstream summary: Multiple array index errors in set.c in dvipng 1.11 and 1.12, and teTeX, allow remote attackers to cause a denial of service (application crash) or […]

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Alpine Linux 3.20 — libass — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — libass — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 0.13.4-r0 📖 ~4 min read  •  Source: Alpine secdb entry — libass 0.13.4-r0 Related CVEs: CVE-2016-7969 CVE-2016-7970 CVE-2016-7971 CVE-2016-7972 Upstream summary: Alpine community repository for vv3.20 ships libass 0.13.4-r0 which addresses CVE-2016-7969. Table of contents Symptom […]

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Debian 13 — node-log4js — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — node-log4js — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-21704 Upstream summary: log4js-node is a port of log4js to node.js. In affected versions default file permissions for log files created by the file, fileSync and dateFile appenders are […]

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Debian 13 — hamlib — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — hamlib — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3736 Upstream summary: ltdl.c in libltdl in GNU Libtool 1.5.x, and 2.2.6 before 2.2.6b, as used in Ham Radio Control Libraries, Q, and possibly other products, attempts to […]

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Windows Server 2019 — KB5062618 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5062618 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5062618 • MSRC update-guide entry Related CVEs: CVE-2025-47980 CVE-2025-55230 CVE-2025-49757 CVE-2025-47971 CVE-2025-47976 CVE-2025-47984 CVE-2025-47985 CVE-2025-47986  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Exposure of sensitive information to […]

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Debian 13 — e2guardian — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — e2guardian — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-44273 Upstream summary: e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a […]

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How to Install CouchDB on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install CouchDB on RHEL 10

Introduction How to Install CouchDB on RHEL 10 on RHEL 10 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 configuration is reproducible and production-safe. […]

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