May 2020 - Page 52 of 69

FreeBSD 12 — rubygem-json — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — rubygem-json — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: rubygem-json — Unsafe Objection Creation Vulnerability in JSON (Additional fix) Related CVEs: CVE-2020-10663 Upstream summary: When parsing certain JSON documents, the json gem (including the one bundled with Ruby) can […]

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Common Problems 117628

Ubuntu 20.04 LTS – certbot renewal fails because port 80 is in use

🟠 High   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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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How to Install Memcached on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Memcached on Debian 9

Introduction How to Install Memcached on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 9. This tutorial […]

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Common Problems 115985

Intermittent DNS Resolution with systemd-resolved

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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 112452

Windows Server 2019 – Group Policy denied due to filtering or WMI scope errors – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 01 April 2027 Affected versions: Windows Server 2019 📖 ~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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FreeBSD 12 — python+ipv — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — python+ipv — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: python — buffer overrun in repr() for unicode strings Related CVEs: CVE-2005-0089 CVE-2006-4980 Upstream summary: Benjamin C. Wiley Sittler reports: I discovered a [buffer overrun in repr() for unicode strings]. […]

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How to Set Up Azure Site Recovery Agent on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up Azure Site Recovery Agent on Windows Server 2012 R2

How to Set Up Azure Site Recovery Agent on Windows Server 2012 R2 Azure Site Recovery (ASR) is Microsoft’s disaster recovery service that replicates physical and virtual workloads to Azure, enabling failover to cloud infrastructure in the event of a primary site failure. For Windows Server 2012 R2 physical servers or on-premises VMs, ASR uses […]

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FreeBSD 12 — dircproxy-devel — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — dircproxy-devel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: dircproxy — remote denial of service Related CVEs: CVE-2007-5226 Upstream summary: Securiweb reports: dircproxy allows remote attackers to cause a denial of service (segmentation fault) via an ACTION command without […]

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