Linux

Ubuntu 18.04 — opendmarc — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — opendmarc — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 April 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6356-1 Related CVEs: CVE-2020-12272 CVE-2020-12460 CVE-2019-16378 Upstream summary: Jianjun Chen, Vern Paxson and Jian Jiang discovered that OpenDMARC incorrectly handled certain inputs. If a user or an automated system were […]

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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2020-5756)

🟠 High   ⏱ 15–60 min  Last verified: 23 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5756 Related CVEs: CVE-2020-0543 CVE-2020-10757 CVE-2020-10711 CVE-2020-12655 CVE-2020-12770 CVE-2019-19769 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Arch Linux — coturn — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — coturn — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202101-21 Related CVEs: CVE-2020-26262 Upstream summary: Type: insufficient validation. Status: Fixed. Affected: 4.5.1.3-2. Fixed in: 4.5.2-1. Group: AVG-1430. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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How to Manage Users and Groups on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Manage Users and Groups on Debian 10

Introduction How to Manage Users and Groups 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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Oracle Linux 8 — fribidi — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — fribidi — vulnerability — patch and remediation guide (ELSA-2019-4361)

🟠 High   ⏱ 15–60 min  Last verified: 23 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-4361 Related CVEs: CVE-2019-18397 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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Oracle Linux 8 — freeradius:3.0 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — freeradius:3.0 — vulnerability — patch and remediation guide (ELSA-2019-1142)

🟠 High   ⏱ 15–60 min  Last verified: 23 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-1142 Related CVEs: CVE-2019-11235 CVE-2019-11234 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Arch Linux — libsoup — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libsoup — vulnerability — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201708-5 Related CVEs: CVE-2017-2885 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 2.58.1-1. Fixed in: 2.58.2-1. Group: AVG-376. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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SLES 12 — graphviz — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — graphviz — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 23 April 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:1646-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-18032 CVE-2018-10196 Upstream summary: Buffer Overflow in Graphviz Graph Visualization Tools from commit ID f8b9e035 and earlier allows remote attackers to execute arbitrary code or […]

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How To Centralize Logs With Journald on Debian 10 — step-by-step Linux tutorial on Progressive Robot

How To Centralize Logs With Journald on Debian 10

In this guide, you will configure a component of the systemd suite of tools to relay log messages from client systems to a centralized log collection server. You will configure the server and client to use TLS certificates to encrypt the log messages as they are transmitted across insecure networks such as the internet and also to authenticate each other.

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Common Problems 121144

Debian 10: NFS mounts hang during boot

🟠 High   ⏱ 5–30 min  Last verified: 22 April 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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