Security Hardening

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

How to Configure Traefik Reverse Proxy on SLES 16

Introduction This tutorial covers How to Configure Traefik 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 date: zypper […]

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Debian 13 — python-aiohttp — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — python-aiohttp — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 16 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-21330 CVE-2023-37276 CVE-2023-47627 CVE-2023-47641 CVE-2023-49081 CVE-2023-49082 CVE-2024-23334 CVE-2024-23829  +12 more Upstream summary: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In aiohttp before version 3.7.4 […]

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

Debian 13 — flvmeta — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 16 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-36243 Upstream summary: FLVMeta v1.2.1 was discovered to contain a buffer overflow via the xml_on_metadata_tag_only function at dump_xml.c. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 16 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-7943 CVE-2021-27019 CVE-2021-27021 Upstream summary: Puppet Server and PuppetDB provide useful performance and debugging information via their metrics API endpoints. For PuppetDB this may contain things like hostnames. […]

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Debian 12 — gi-docgen — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — gi-docgen — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 16 November 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-11687 Upstream summary: A flaw was found in the gi-docgen. This vulnerability allows arbitrary JavaScript execution in the context of the page — enabling DOM access, session cookie […]

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Windows Server 2019 — KB5055518 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5055518 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5055518 • MSRC update-guide entry Related CVEs: CVE-2025-26663 CVE-2025-26686 CVE-2025-26670 CVE-2025-27491 CVE-2023-40547 CVE-2025-26665 CVE-2025-26666 CVE-2025-26669  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Use after free in Windows […]

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How to Configure Apache with mod_pagespeed on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure Apache with mod_pagespeed on SLES 16

Introduction This tutorial covers How to Configure Apache with mod_pagespeed 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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Ubuntu 20.04 — modsecurity-apache — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — modsecurity-apache — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 16 November 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7567-1 Related CVEs: CVE-2025-47947 CVE-2025-48866 CVE-2021-42717 CVE-2022-48279 CVE-2023-24021 Upstream summary: Simon Studer discovered that ModSecurity incorrectly handled certain JSON objects. An attacker could possibly use this issue to cause a […]

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Ubuntu 20.04 — libcryptx-perl — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libcryptx-perl — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 16 November 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8128-1 Related CVEs: CVE-2018-25099 CVE-2025-40914 CVE-2025-40912 Upstream summary: It was discovered that CryptX did not verify authentication tags while performing GCM and ChaCha20-Poly1305 decryption. An attacker could possibly use this […]

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AlmaLinux 8 — pybind11 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — pybind11 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2025:23530 Related CVEs: CVE-2024-11168 CVE-2024-5642 CVE-2024-9287 CVE-2025-0938 CVE-2025-4138 CVE-2025-4330 CVE-2025-4435 CVE-2025-4516  +12 more Upstream summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic […]

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