Security Hardening

Ubuntu 18.04 — avahi — multiple vulnerabilities (15 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — avahi — multiple vulnerabilities (15 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 31 July 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8269-1 Related CVEs: CVE-2026-24401 CVE-2026-34933 CVE-2025-68276 CVE-2025-68468 CVE-2025-68471 CVE-2023-38469 CVE-2023-38470 CVE-2023-38471  +7 more Upstream summary: It is discovered that Avahi incorrectly handled crafted input. A remote attacker could possibly use […]

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How to Set Up SSH Key Authentication on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Set Up SSH Key Authentication on FreeBSD 15

Introduction Deploying set up ssh key authentication on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + […]

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How to Configure iSCSI Storage on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure iSCSI Storage on SLES 16

Introduction This tutorial covers How to Configure iSCSI Storage on SLES 16 on SLES 16. SLES 16 (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 16 system is up to date: zypper refresh […]

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Amazon Linux 2023 — mod_security_crs — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — mod_security_crs — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1399 Related CVEs: CVE-2026-21876 CVE-2026-33691 Upstream summary: The OWASP core rule set (CRS) is a set of generic attack detection rules for use with compatible web application firewalls. Prior to […]

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How to Set Up Log Rotation on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up Log Rotation on SLES 16

Introduction This tutorial covers How to Set Up Log Rotation on SLES 16 on SLES 16. SLES 16 (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 16 system is up to date: zypper […]

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FreeBSD 15 — shutter — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — shutter — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: shutter — arbitrary code execution Related CVEs: CVE-2015-0854 Upstream summary: Luke Farone reports: In the "Shutter" screenshot application, I discovered that using the "Show in folder" menu option while viewing […]

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FreeBSD 15 — foreman-proxy — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — foreman-proxy — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: foreman-proxy SSL verification issue Related CVEs: CVE-2014-3691 Upstream summary: Foreman Security reports: The smart proxy when running in an SSL-secured mode permits incoming API calls to any endpoint without requiring, […]

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FreeBSD 15 — ap24-mod_fcgid — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — ap24-mod_fcgid — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mod_fcgid — possible heap buffer overwrite Related CVEs: CVE-2013-4365 Upstream summary: Apache Project reports: Fix possible heap buffer overwrite. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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FreeBSD 15 — ikiwiki — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — ikiwiki — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 30 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ikiwiki — authentication bypass vulnerability Related CVEs: CVE-2008-0165 CVE-2008-0169 CVE-2008-0808 CVE-2009-2944 CVE-2011-1408 CVE-2016-10026 CVE-2016-4561 CVE-2016-9645  +2 more Upstream summary: ikiwiki reports: The ikiwiki maintainers discovered further flaws similar to CVE-2016-9646 […]

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