chris

How to Set Up ModSecurity WAF with Apache on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up ModSecurity WAF with Apache on RHEL 9

ModSecurity is the leading open-source Web Application Firewall (WAF), capable of inspecting all HTTP requests and responses against a ruleset and blocking malicious traffic including SQL injection, cross-site scripting (XSS), remote file inclusion, and OWASP Top 10 attack patterns. Combined with the OWASP Core Rule Set (CRS), ModSecurity transforms Apache into a security gateway that […]

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Debian 13 — sslh — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — sslh — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-46806 CVE-2025-46807 CVE-2025-52936 Upstream summary: A Use of Out-of-range Pointer Offset vulnerability in sslh leads to denial of service on some architectures.This issue affects sslh before 2.2.4. Table […]

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Debian 13 — openfortivpn — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — openfortivpn — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-7041 CVE-2020-7042 CVE-2020-7043 Upstream summary: An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL 1.0.2 or later. tunnel.c mishandles certificate validation because an X509_check_host negative error […]

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How to Install WooCommerce on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Install WooCommerce on SLES 16

Introduction This tutorial covers How to Install WooCommerce 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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How to Configure PostgreSQL High Availability with Patroni on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure PostgreSQL High Availability with Patroni on SLES 16

Introduction This tutorial covers How to Configure PostgreSQL High Availability with Patroni 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 […]

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Debian 13 — mpv — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — mpv — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-6360 CVE-2020-19824 CVE-2021-30145 Upstream summary: mpv through 0.28.0 allows remote attackers to execute arbitrary code via a crafted web site, because it reads HTML documents containing VIDEO elements, […]

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Alpine Linux 3.20 — cracklib — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — cracklib — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 2.9.7-r0 📖 ~4 min read  •  Source: Alpine secdb entry — cracklib 2.9.7-r0 Related CVEs: CVE-2016-6318 Upstream summary: Alpine main repository for vv3.20 ships cracklib 2.9.7-r0 which addresses CVE-2016-6318. Table of contents Symptom & Impact Environment […]

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How to Set Up Nexus Repository Manager on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Set Up Nexus Repository Manager on Oracle Linux 10

Introduction How to Set Up Nexus Repository Manager on Oracle Linux 10 on Oracle Linux 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 […]

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How to Install and Configure Caddy Web Server on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Configure Caddy Web Server on RHEL 9

Caddy is a modern, open-source web server written in Go that stands out for one defining feature: automatic HTTPS. Caddy obtains and renews TLS certificates from Let’s Encrypt or ZeroSSL automatically, with zero configuration required beyond specifying a domain name. It also supports HTTP/2 and HTTP/3 (QUIC) out of the box, and its declarative Caddyfile […]

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Ubuntu 18.04 — php7.2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — php7.2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 November 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7953-1 Related CVEs: CVE-2025-14178 CVE-2025-14180 CVE-2025-14177 CVE-2025-1735 https://launchpad.net/bugs/2121643 CVE-2025-1220 CVE-2025-6491 CVE-2025-1734  +12 more Upstream summary: It was discovered that PHP incorrectly handled memory while reading images in multi-chunk mode. An […]

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