Logging Monitoring

Ubuntu 16.04 — libjpeg9 — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libjpeg9 — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 17 July 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5336-1 Related CVEs: CVE-2016-3616 CVE-2018-11212 CVE-2018-11213 CVE-2018-11214 CVE-2018-11813 CVE-2020-14152 CVE-2020-14153 Upstream summary: Aladdin Mubaied discovered that the cjpeg utility in libjpeg9 did not properly validate the input image's size. An […]

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How to Install and Configure Samba File Server on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Configure Samba File Server on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up install and configure samba file server on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step […]

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

Oracle Linux 8 — dnsmasq — vulnerability — patch and remediation guide (ELSA-2021-0150)

🟠 High   ⏱ 15–60 min  Last verified: 17 July 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0150 Related CVEs: CVE-2020-25685 CVE-2020-25681 CVE-2020-25683 CVE-2020-25684 CVE-2020-25687 CVE-2020-25682 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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openSUSE Tumbleweed — zim — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — zim — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-10870 Upstream summary: Zim through 0.72.1 creates temporary directories with predictable names. A malicious user could predict and create Zim's temporary directories and prevent other […]

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How to Set Up System Center Configuration Manager on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Set Up System Center Configuration Manager on Windows Server 2016

How to Configure Windows Server 2016 Configuration Manager System Center Configuration Manager (SCCM), also known as ConfigMgr or now Microsoft Endpoint Configuration Manager, is the enterprise-grade solution for managing large fleets of Windows servers and workstations. SCCM handles operating system deployment, software distribution, patch management, hardware and software inventory, compliance settings, and endpoint protection from […]

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Common Problems 121509

Debian 9 interrupted dpkg Requires Manual Configuration

🟠 High   ⏱ 5–30 min  Last verified: 16 July 2020 Affected versions: Debian 9 📖 ~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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Common Problems 115471

firewalld Zone-Interface Mismatch Causing Intermittent Access

🟡 Medium   ⏱ 5–30 min  Last verified: 16 July 2020 📖 ~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 & Cross-Refs References & Further […]

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Common Problems 115058

RHEL 8 nftables and firewalld Rules Conflict After Manual Changes

🟡 Medium   ⏱ 5–30 min  Last verified: 16 July 2020 📖 ~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 & Cross-Refs References & Further […]

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How to Configure GPG Key Management on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure GPG Key Management on Debian 9

Introduction Deploying configure gpg key management on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before you […]

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Ubuntu 20.04 — blueman — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — blueman — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 16 July 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4605-2 Related CVEs: https://launchpad.net/bugs/1897287 CVE-2020-15238 Upstream summary: Vaisha Bernard discovered that blueman did not properly sanitize input on the d-bus interface to blueman-mechanism. A local attacker could possibly use this […]

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