Linux

Debian 12 — minidlna — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — minidlna — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 November 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-2738 CVE-2013-2739 CVE-2013-2745 CVE-2020-12695 CVE-2020-28926 CVE-2022-26505 CVE-2023-33476 CVE-2023-47430  +1 more Upstream summary: minidlna has SQL Injection that may allow retrieval of arbitrary files Table of contents Symptom & […]

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Oracle Linux 8 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel — vulnerability — patch and remediation guide (ELSA-2024-12169)

🟠 High   ⏱ 15–60 min  Last verified: 9 November 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-12169 Related CVEs: CVE-2023-6536 CVE-2023-40283 CVE-2023-1073 CVE-2023-4921 CVE-2023-1838 CVE-2022-3545 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 12 — firefox-esr — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — firefox-esr — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 9 November 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2006-2723 CVE-2006-4310 CVE-2006-5462 CVE-2006-5463 CVE-2006-5464 CVE-2006-5633 CVE-2006-5747 CVE-2006-5748  +12 more Upstream summary: Unspecified versions of Mozilla Firefox allow remote attackers to cause a denial of service (crash) via […]

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Alpine Linux 3.18 — bat — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — bat — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 0.21.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — bat 0.21.0-r0 Related CVEs: CVE-2022-24713 Upstream summary: Alpine community repository for vv3.18 ships bat 0.21.0-r0 which addresses CVE-2022-24713. Table of contents Symptom & Impact Environment […]

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openSUSE Leap 15.5 — optipng — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.5

openSUSE Leap 15.5 — optipng — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.5 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2023:0388-1 (see also SUSE bugzilla) Related CVEs: CVE-2023-43907 Upstream summary: OptiPNG v0.7.7 was discovered to contain a global buffer overflow via the 'buffer' variable at gifread.c. Table of contents Symptom & […]

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How to Configure SSH Hardening on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure SSH Hardening on Debian 12

Introduction How to Configure SSH Hardening on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. This […]

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Common Problems 124597

Oracle Linux 9 – Common Problem 014 – Diagnosis and Fix

🟡 Medium   ⏱ 5–30 min  Last verified: 8 November 2023 Affected versions: Oracle Linux 9 📖 ~2 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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Common Problems 120172

Debian 12 – Fail2ban Not Banning with nftables Backend – Jail Action Fix

🟡 Medium   ⏱ 5–30 min  Last verified: 8 November 2023 Affected versions: Debian 12 📖 ~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 Set Up OpenVSwitch on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up OpenVSwitch on CentOS Stream 9

Introduction Setting up set up openvswitch on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up OpenVSwitch on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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Common Problems 117063

Ubuntu 22.04 LTS – Nginx returns 502 due to missing php-fpm socket – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 November 2023 Affected versions: Ubuntu 22.04 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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