Logging Monitoring

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

Ubuntu 18.04 — freeimage — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 June 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6586-1 Related CVEs: CVE-2019-12211 CVE-2019-12213 CVE-2020-21427 CVE-2020-21428 CVE-2020-22524 Upstream summary: It was discovered that FreeImage incorrectly handled certain memory operations. If a user were tricked into opening a crafted TIFF […]

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openSUSE Tumbleweed — tuxguitar — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — tuxguitar — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-14940 CVE-2020-13940 Upstream summary: An issue was discovered in io/gpx/GPXDocumentReader.java in TuxGuitar 1.5.4. It uses misconfigured XML parsers, leading to XXE while loading GP6 (.gpx) […]

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Common Problems 112463

Windows Server 2019 — DHCP scope exhaustion caused by stale reservations and delayed lease reclamation — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 June 2020 Affected versions: Windows Server 2019 📖 ~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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How to Install Ruby on Rails on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Ruby on Rails on Debian 10

Introduction How to Install Ruby on Rails on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster 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 10. […]

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Alpine Linux edge — uwsgi — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — uwsgi — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.0.16-r0 📖 ~4 min read  •  Source: Alpine secdb entry — uwsgi 2.0.16-r0 Related CVEs: CVE-2018-6758 Upstream summary: Alpine main repository for vedge ships uwsgi 2.0.16-r0 which addresses CVE-2018-6758. Table of contents Symptom & Impact Environment […]

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FreeBSD 12 — monkey — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — monkey — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: monkey — improper input validation vulnerability Upstream summary: Census Labs reports: We have discovered a remotely exploitable "improper input validation" vulnerability in the Monkey web server that allows an attacker […]

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Debian 10 — file — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — file — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 June 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-18218 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 Use journalctl for Systemd Log Analysis on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Use journalctl for Systemd Log Analysis on RHEL 8

The journalctl command is the primary interface for querying and browsing logs collected by systemd-journald on RHEL 8. Unlike traditional syslog files, the systemd journal stores structured, binary log data that can be filtered by unit, priority, time range, PID, and more. Mastering journalctl allows administrators to diagnose service failures, track kernel events, and export […]

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Alpine Linux edge — tinc — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — tinc — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.0.35-r0 📖 ~4 min read  •  Source: Alpine secdb entry — tinc 1.0.35-r0 Related CVEs: CVE-2018-16737 CVE-2018-16738 CVE-2018-16758 Upstream summary: Alpine main repository for vedge ships tinc 1.0.35-r0 which addresses CVE-2018-16737. Table of contents Symptom & […]

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Ubuntu 20.04 — libntlm — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libntlm — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 June 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5108-1 Related CVEs: CVE-2019-17455 Upstream summary: It was discovered that Libntlm incorrectly handled specially crafted NTML requests. An attacker could possibly use this issue to cause a denial of service […]

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