Linux

Common Problems 117946

Ubuntu 18.04 LTS – DNS resolution fails with systemd-resolved stub issues – Fix & Prevention (FIX-PREVENTION-2)

🟠 High   ⏱ 5–30 min  Last verified: 23 November 2021 Affected versions: Ubuntu 18.04 LTS 📖 ~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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AlmaLinux 8 — nmstate — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — nmstate — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2022:1772 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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AlmaLinux 8 — crash — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — crash — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:1864 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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

openSUSE Tumbleweed — jdom — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2021:1031-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-33813 Upstream summary: An XXE issue in SAXBuilder in JDOM through 2.0.6 allows attackers to cause a denial of service via a crafted HTTP request. […]

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Comment installer Webmin sur Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Comment installer Webmin sur Ubuntu 20.04

Webmin est un panneau de contrôle web moderne qui vous permet d’administrer votre serveur Linux via une interface basée sur un navigateur. Avec Webmin, vous pouvez gérer les comptes d’utilisateurs, configurer les paramètres DNS et modifier les…

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Debian 10 — libuv1 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — libuv1 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 November 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-22918 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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Debian 11 — mpack — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — mpack — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-1424 CVE-2002-1425 CVE-2011-4919 Upstream summary: Buffer overflow in munpack in mpack 1.5 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code. […]

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Arch Linux — python-pillow — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — python-pillow — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202107-26 Related CVEs: CVE-2021-34552 CVE-2020-35655 CVE-2020-35654 CVE-2020-35653 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 8.2.0-2. Fixed in: 8.3.0-1. Group: AVG-2150. Table of contents Symptom & Impact Environment & […]

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How To Create a SSL Certificate on Apache for Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Create a SSL Certificate on Apache for Ubuntu 14.04

The Apache web server is the most popular way to serve content on the web. If you need to communicate with your site visitors over a secured connection, setting up a TLS or SSL certificate will enable you to encrypt traffic. In this guide, we’ll discuss how to create a self-signed SSL certificate on Ubuntu 14.04 and use it with Apache to encrypt traffic.

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Oracle Linux 8 — curl — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — curl — security and stability fixes — required update (ELSA-2019-3701)

🟡 Medium   ⏱ 10–30 min  Last verified: 22 November 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3701 Related CVEs: CVE-2019-3822 CVE-2019-3823 CVE-2018-20483 CVE-2018-16890 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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