Security Hardening

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 113137

Windows Server 2016 — Component store partial rebuild leaves features missing after restore — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 June 2020 Affected versions: Windows Server 2016 📖 ~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 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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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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Common Problems 121155

Debian 10 Permissions Changed Incorrectly After Recursive chmod

🟠 High   ⏱ 5–30 min  Last verified: 13 June 2020 Affected versions: Debian 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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CHAT