Security Hardening

Common Problems 116467

Ubuntu 24.04 LTS – snap install fails because snapd cannot reach store – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 21 September 2025 Affected versions: Ubuntu 24.04 LTS 📖 ~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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Debian 13 — loggerhead — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — loggerhead — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 September 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-0728 Upstream summary: Cross-site scripting (XSS) vulnerability in templatefunctions.py in Loggerhead before 1.18.1 allows remote authenticated users to inject arbitrary web script or HTML via a filename, which […]

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Debian 13 — game-music-emu — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — game-music-emu — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 21 September 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-9957 CVE-2016-9958 CVE-2016-9959 CVE-2016-9960 CVE-2016-9961 CVE-2017-17446 Upstream summary: Stack-based buffer overflow in game-music-emu before 0.6.1. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick […]

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Amazon Linux 2023 — nvidia-imex — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — nvidia-imex — multiple vulnerabilities (7 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 ALAS2023NVIDIA-2026-267 Related CVEs: CVE-2025-33219 CVE-2025-23280 CVE-2025-23282 CVE-2025-23300 CVE-2025-23330 CVE-2025-23332 CVE-2025-23345 Upstream summary: NVIDIA Display Driver for Linux contains a vulnerability in the NVIDIA kernel module where an attacker could cause […]

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How to Configure MongoDB Authentication on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure MongoDB Authentication on Debian 13

Introduction This guide explains how to Configure MongoDB Authentication on Debian 13 on Debian 13 Trixie. Debian Trixie uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 13 install with the standard […]

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Common Problems 116463

Ubuntu 24.04 LTS – systemd-resolved returns intermittent DNS failures

🟠 High   ⏱ 5–30 min  Last verified: 21 September 2025 Affected versions: Ubuntu 24.04 LTS Ubuntu 24.04 Ubuntu 24.04.1 📖 ~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 […]

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Debian 13 — rust-net2 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — rust-net2 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 September 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-35919 Upstream summary: An issue was discovered in the net2 crate before 0.2.36 for Rust. It has false expectations about the std::net::SocketAddr memory representation. Table of contents Symptom & […]

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Ubuntu 18.04 — modsecurity-apache — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — modsecurity-apache — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 21 September 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~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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How to Configure Jenkins with HTTPS via Nginx on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Jenkins with HTTPS via Nginx on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure jenkins with https via nginx both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Jenkins with HTTPS via Nginx on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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

AlmaLinux 8 — hivex — 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-2024:4420 Related CVEs: CVE-2024-4467 CVE-2022-40284 CVE-2023-3354 CVE-2020-35517 CVE-2025-11234 CVE-2025-49133 CVE-2024-3446 CVE-2024-7383  +12 more Upstream summary: Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel […]

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