Troubleshooting

How to Install MongoDB on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install MongoDB on RHEL 7

How to Install MongoDB on RHEL 7 MongoDB is a document-oriented NoSQL database that stores data in flexible, JSON-like BSON documents rather than traditional rows and columns. Its schema-less design makes it an excellent choice for applications that need to handle varied or rapidly evolving data structures, such as content management systems, real-time analytics platforms, […]

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Oracle Linux 8 — bzip2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bzip2 — vulnerability — patch and remediation guide (ELSA-2024-8922)

🟢 Low   ⏱ 5–15 min  Last verified: 13 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-8922 Related CVEs: CVE-2019-12900 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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openSUSE Tumbleweed — alsa — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — alsa — 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-2009-0035 Upstream summary: alsa-utils 1.0.19 and later versions allows local users to overwrite arbitrary files via a symlink attack via the /usr/bin/alsa-info and /usr/bin/alsa-info.sh scripts. […]

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Oracle Linux 8 — libxml2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libxml2 — vulnerability — patch and remediation guide (ELSA-2021-1597)

🟡 Medium   ⏱ 10–30 min  Last verified: 13 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1597 Related CVEs: CVE-2020-24977 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 Configure Docker Networking on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Docker Networking on RHEL 8

Docker networking determines how containers communicate with each other, with the host, and with external networks. RHEL 8 adds a layer of complexity because Docker writes its own iptables rules at startup, which can interact unexpectedly with firewalld — the default firewall manager on RHEL 8. Understanding Docker’s network drivers and how they map to […]

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FreeBSD 12 — libressl — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — libressl — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 13 April 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: LibreSSL — overwrite and -read vulnerability Related CVEs: CVE-2014-8176 CVE-2015-0204 CVE-2015-0206 CVE-2015-0209 CVE-2015-0286 CVE-2015-0287 CVE-2015-0288 CVE-2015-0289  +12 more Upstream summary: The LibreSSL project reports: An incorrect length check can result […]

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FreeBSD 12 — ruby — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — ruby — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 13 April 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: rubygem-resolv — Possible denial of service Related CVEs: CVE-2004-0755 CVE-2004-0983 CVE-2005-1992 CVE-2005-2337 CVE-2006-3694 CVE-2006-5467 CVE-2006-6303 CVE-2008-1447  +12 more Upstream summary: Manu reports: The vulnerability is caused by an insufficient check […]

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Common Problems 112971

Windows Server 2016 — SoftwareDistribution Corruption Causes Endless Update Retry Loop — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 12 April 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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How to Enable HTTP/2 in Nginx on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Enable HTTP/2 in Nginx on FreeBSD 12

Introduction Deploying enable http/2 in nginx on freebsd 12 on a FreeBSD 12 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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openSUSE Tumbleweed — ruby2.7-rubygem-loofah — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — ruby2.7-rubygem-loofah — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2025:14697-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-8048 CVE-2019-15587 Upstream summary: In the Loofah gem through 2.2.0 for Ruby, non-whitelisted HTML attributes may occur in sanitized output by republishing a crafted HTML […]

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