Linux

How to Set Up a LEMP Stack (Linux, Nginx, MySQL, PHP) on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up a LEMP Stack (Linux, Nginx, MySQL, PHP) on RHEL 9

A LEMP stack — Linux, Nginx, MySQL (or MariaDB), and PHP — is the standard modern web server stack for hosting PHP applications such as WordPress, Laravel, Drupal, and Magento. Compared to the traditional LAMP stack, Nginx handles concurrent requests more efficiently under high load due to its event-driven non-blocking architecture, making it the preferred […]

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Amazon Linux 2 — python2-setuptools — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — python2-setuptools — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2025-2877 Related CVEs: CVE-2025-47273 CVE-2024-6345 CVE-2022-40897 Upstream summary: setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. A path traversal vulnerability in `PackageIndex` […]

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Debian 13 — node-express — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — node-express — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2014-6393 CVE-2024-10491 CVE-2024-29041 CVE-2024-43796 Upstream summary: The Express web framework before 3.11 and 4.x before 4.5 for Node.js does not provide a charset field in HTTP Content-Type headers […]

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

How to Install and Configure OpenLiteSpeed Web Server on RHEL 9

OpenLiteSpeed (OLS) is the open-source version of LiteSpeed Web Server — one of the highest-performance HTTP servers available, purpose-built for serving PHP applications. OpenLiteSpeed uses an event-driven architecture similar to Nginx but includes a built-in PHP engine (LSAPI) that processes PHP requests 3–5x faster than PHP-FPM behind Nginx, eliminating the socket overhead of the FastCGI […]

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Debian 13 — needrestart — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — needrestart — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-30688 CVE-2024-11003 CVE-2024-48990 CVE-2024-48991 CVE-2024-48992 Upstream summary: needrestart 0.8 through 3.5 before 3.6 is prone to local privilege escalation. Regexes to detect the Perl, Python, and Ruby interpreters […]

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Debian 13 — graphite-web — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — graphite-web — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-5093 CVE-2013-5942 CVE-2013-5943 CVE-2017-18638 CVE-2022-4728 CVE-2022-4729 CVE-2022-4730 Upstream summary: The renderLocalView function in render/views.py in graphite-web in Graphite 0.9.5 through 0.9.10 uses the pickle Python module unsafely, which […]

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Alpine Linux 3.20 — rpm — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — rpm — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 4.18.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — rpm 4.18.0-r0 Related CVEs: CVE-2021-35937 CVE-2021-35938 CVE-2021-35939 CVE-2021-3521 CVE-2021-3421 CVE-2021-20271 CVE-2021-20266 Upstream summary: Alpine community repository for vv3.20 ships rpm 4.18.0-r0 which addresses CVE-2021-35937. Table […]

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How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 9

HAProxy (High Availability Proxy) is a battle-hardened open-source load balancer and proxy for TCP and HTTP workloads. Where Nginx load balancing is sufficient for simple round-robin HTTP distribution, HAProxy provides a richer feature set: advanced health checks with multiple failure thresholds, ACL-based routing, Layer 4 TCP load balancing for non-HTTP protocols (MySQL, Redis, SMTP), detailed […]

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Debian 12 — python-tornado — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — python-tornado — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 9 November 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-2374 CVE-2013-2099 CVE-2014-9720 CVE-2023-28370 CVE-2024-52804 CVE-2025-47287 CVE-2025-67724 CVE-2025-67725  +3 more Upstream summary: CRLF injection vulnerability in the tornado.web.RequestHandler.set_header function in Tornado before 2.2.1 allows remote attackers to inject […]

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