DNS

Ubuntu 14.04 — dnsmasq — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — dnsmasq — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 April 2026 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8268-1 Related CVEs: CVE-2026-4890 CVE-2026-4891 CVE-2026-2291 CVE-2026-4892 CVE-2026-5172 CVE-2026-4893 CVE-2019-14834 CVE-2023-28450  +8 more Upstream summary: Andrew S. Fasano, Royce M, and Hugo Martinez Ray discovered that Dnsmasq did not allocate […]

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Common Problems 124139

Oracle Linux 10 – tuned profile switches back to balanced unexpectedly – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 14 April 2026 Affected versions: Oracle Linux 10 📖 ~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 Errors […]

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How to Configure Apache as a Reverse Proxy on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Apache as a Reverse Proxy on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure apache as a reverse proxy both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Apache as a Reverse Proxy on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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How to Install Ansible Navigator on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Ansible Navigator on RHEL 10

Introduction This tutorial demonstrates how to Install Ansible Navigator on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream repositories enabled. […]

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Red Hat Enterprise Linux 9 — unbound — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — unbound — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:18931 Related CVEs: CVE-2024-33655 CVE-2025-11411 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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

Debian 13 — pdns — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 12 April 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-0038 CVE-2005-0428 CVE-2005-2301 CVE-2005-2302 CVE-2006-4251 CVE-2008-3337 CVE-2008-5277 CVE-2012-0206  +12 more Upstream summary: The DNS implementation of PowerDNS 2.9.16 and earlier allows remote attackers to cause a denial of […]

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Debian 12 — smartdns — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — smartdns — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 12 April 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2026-1425 Upstream summary: A security flaw has been discovered in pymumu SmartDNS up to 47.1. This vulnerability affects the function _dns_decode_rr_head/_dns_decode_SVCB_HTTPS of the file src/dns.c of the component […]

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Red Hat Enterprise Linux 8 — bind — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 8 — bind — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 8 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:16060 Related CVEs: CVE-2026-1519 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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How to Configure mod_rewrite Rules in Apache on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure mod_rewrite Rules in Apache on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure mod_rewrite rules in apache both straightforward and auditable. This tutorial covers the complete procedure for how to Configure mod_rewrite Rules in Apache on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Amazon Linux 2023 — bind — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — bind — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1533 Related CVEs: CVE-2026-1519 CVE-2025-40778 CVE-2025-40780 CVE-2025-8677 CVE-2025-40777 CVE-2024-11187 CVE-2024-12705 CVE-2024-1737  +12 more Upstream summary: If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the […]

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