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Windows Server 2019 — KB5050061 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5050061 — 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 KB5050061 • MSRC update-guide entry Related CVEs: CVE-2025-21294 CVE-2025-21298 CVE-2025-21307 CVE-2025-21411 CVE-2025-21413 CVE-2025-21210 CVE-2025-21214 CVE-2025-21215  +12 more Affected components: Windows Server 2019 (Server Core installation) Table of contents Symptom & Impact Environment […]

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Common Problems 113974

RHEL 10 – SELinux Denies Custom Application Port Access – Label and Policy Fix

  • November 7, 2025
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 7 November 2025 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related […]

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

How to Configure MySQL Replication on SLES 16

Introduction This tutorial covers How to Configure MySQL Replication 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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NetBSD 9.4 — powerdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — powerdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • November 7, 2025
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2012-1193 CVE-2020-10995 CVE-2020-12244 CVE-2020-14196 CVE-2022-27227 CVE-2023-22617 CVE-2025-30195 CVE-2025-30192  +12 more Upstream summary: pkgsrc audit-packages flagged powerdns-recursor<3.1.7.2 for vulnerability class 'arbitrary-code-execution'. Reference: http://doc.powerdns.com/powerdns-advisory-2010-01.html Table of contents Symptom & Impact Environment […]

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How to Configure Nginx as a Reverse Proxy on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Nginx as a Reverse Proxy on RHEL 9

  • November 7, 2025
  • Linux
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A reverse proxy sits in front of one or more backend application servers, forwarding client requests to them and returning their responses to the client. From the client’s perspective, the reverse proxy is the web server. This architecture provides centralized SSL termination, load balancing, caching, rate limiting, and DDoS mitigation without exposing backend application ports […]

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Oracle Linux 10 — libsoup3 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — libsoup3 — vulnerability — patch and remediation guide (ELSA-2025-23139)

  • November 7, 2025
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 7 November 2025 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-23139 Related CVEs: CVE-2025-12105 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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

How to Configure Nginx as a Reverse Proxy on SLES 16

Introduction This tutorial covers How to Configure Nginx 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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Oracle Linux 10 — valkey — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — valkey — vulnerability — patch and remediation guide (ELSA-2025-11401)

  • November 7, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 7 November 2025 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-11401 Related CVEs: CVE-2025-48367 CVE-2025-32023 CVE-2025-27151 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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How to Secure Apache with Let's Encrypt and Certbot on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Secure Apache with Let’s Encrypt and Certbot on RHEL 9

  • November 7, 2025
  • Linux
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Like Nginx, Apache can be secured with free SSL/TLS certificates from Let’s Encrypt using Certbot. The python3-certbot-apache plugin performs domain validation, obtains the certificate, and automatically updates your Apache virtual host configuration with the SSL directives, HTTP-to-HTTPS redirect, and modern cipher settings. This guide covers installing Certbot on RHEL 9, obtaining a certificate for your […]

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NetBSD 9.4 — libwebsockets — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — libwebsockets — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • November 7, 2025
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2025-11677 CVE-2025-11678 CVE-2025-11679 CVE-2025-11680 Upstream summary: pkgsrc audit-packages flagged libwebsockets<4.3.7 for vulnerability class 'use-after-free'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-11677 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick […]

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