Security Hardening

How to Configure Chef Client on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure Chef Client on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure chef client on ibm aix 7.1 on IBM […]

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FreeBSD 13 — py311-kerberos — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py311-kerberos — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 December 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-kerberos — DoS and MitM vulnerabilities Related CVEs: CVE-2015-3206 Upstream summary: macosforgebot reports: The checkPassword function in python-kerberos does not authenticate the KDC it attempts to communicate with, which allows […]

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How to Set Up Galera Cluster for MariaDB on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up Galera Cluster for MariaDB on SLES 12

Introduction This tutorial covers How to Set Up Galera Cluster for MariaDB on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to […]

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AlmaLinux 8 — osbuild — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — osbuild — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:1804 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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FreeBSD 13 — zsh — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — zsh — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 December 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: zsh — Arbitrary command execution vulnerability Related CVEs: CVE-2021-45444 Upstream summary: Marc Cornellà reports: Some prompt expansion sequences, such as %F, support 'arguments' which are themselves expanded in case they […]

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FreeBSD 13 — davmail — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — davmail — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 December 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: davmail — fix potential CVE-2014-3566 vulnerability (POODLE) Related CVEs: CVE-2014-3566 Upstream summary: Mickaël Guessant reports: DavMail 4.6.0 released Enhancements: Fix potential CVE-2014-3566 vulnerability. Table of contents Symptom & Impact Environment […]

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Debian 11 — jackson-dataformat-cbor — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — jackson-dataformat-cbor — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-28491 Upstream summary: This affects the package com.fasterxml.jackson.dataformat:jackson-dataformat-cbor from 0 and before 2.11.4, from 2.12.0-rc1 and before 2.12.1. Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception. […]

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AlmaLinux 8 — llvm — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — llvm — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4743 Related CVEs: CVE-2021-42574 Upstream summary: LLVM Toolset provides the LLVM compiler infrastructure framework, the Clang compiler for the C and C++ languages, the LLDB debugger, and related tools for code analysis. […]

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How to Configure Mandatory Access Control on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Mandatory Access Control on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up configure mandatory access control on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux […]

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