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

Debian 13 — gawk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-4156 Upstream summary: A heap out-of-bounds read flaw was found in builtin.c in the gawk package. This issue may lead to a crash and could be used to read […]

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How to Harden Nginx: Security Headers, TLS 1.3, OCSP Stapling on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Harden Nginx: Security Headers, TLS 1.3, OCSP Stapling on RHEL 9

A default Nginx installation serves content, but many security hardening steps are not enabled by default. Hardening Nginx means configuring HTTP security headers to prevent XSS, clickjacking, and MIME sniffing attacks; enforcing TLS 1.3 and strong cipher suites to eliminate outdated protocol vulnerabilities; enabling OCSP Stapling so clients can verify certificate validity without a round-trip […]

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Debian 13 — gnulib — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — gnulib — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-5155 CVE-2018-17942 Upstream summary: In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of […]

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How to Configure Apache as a Reverse Proxy on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure Apache as a Reverse Proxy on SLES 16

Introduction This tutorial covers How to Configure Apache as a Reverse Proxy 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 — python-flask-cors — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — python-flask-cors — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-25032 CVE-2024-1681 CVE-2024-6221 CVE-2024-6839 CVE-2024-6844 CVE-2024-6866 Upstream summary: An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to access […]

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

How to Configure Audit Logging on SLES 16

Introduction This tutorial covers How to Configure Audit Logging 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 Nginx WebSocket Proxying on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Nginx WebSocket Proxying on RHEL 9

WebSockets provide full-duplex communication channels over a single TCP connection, enabling real-time features such as live chat, push notifications, collaborative editing, gaming, and live dashboards. Unlike standard HTTP, which is request-response, WebSocket connections are persistent and bidirectional — the server can push data to clients at any time without a client request. Nginx can act […]

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

Debian 13 — pesign — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-3560 Upstream summary: A flaw was found in pesign. The pesign package provides a systemd service used to start the pesign daemon. This service unit runs a script to […]

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How to Manage Systemd Services on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Manage Systemd Services on SLES 16

Introduction This tutorial covers How to Manage Systemd Services 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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Debian 13 — filezilla — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — filezilla — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-0317 CVE-2007-2318 CVE-2013-4206 CVE-2013-4207 CVE-2013-4208 CVE-2013-4852 CVE-2019-5429 CVE-2023-48795  +1 more Upstream summary: Format string vulnerability in the LogMessage function in FileZilla before 3.0.0-beta5 allows remote attackers to cause […]

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