Operations

Ubuntu 14.04 — dovecot — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — dovecot — multiple vulnerabilities (11 CVEs) — patch and remediation guide

  • March 28, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 28 March 2021 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4674-2 Related CVEs: CVE-2020-25275 CVE-2020-12100 CVE-2020-12673 CVE-2020-12674 CVE-2019-11500 CVE-2019-7524 CVE-2019-3814 CVE-2017-14461  +3 more Upstream summary: USN-4674-1 fixed a vulnerability in Dovecot. This update provides the corresponding update for Ubuntu 14.04 […]

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How to Set Up a Docker Swarm Cluster on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up a Docker Swarm Cluster on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up a docker swarm cluster on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up a Docker Swarm Cluster on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, […]

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Gentoo Linux — media-video/gpac — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — media-video/gpac — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • March 28, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202408-21 Related CVEs: CVE-2020-22673 CVE-2020-22674 CVE-2020-22675 CVE-2020-22677 CVE-2020-22678 CVE-2020-22679 CVE-2020-25427 CVE-2020-35979  +12 more Upstream summary: Multiple vulnerabilities have been discovered in GPAC. Please review the CVE identifiers referenced below for details. Table […]

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Arch Linux — lib32-nss — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — lib32-nss — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • March 28, 2021
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201705-21 Related CVEs: CVE-2017-5461 CVE-2021-43527 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 3.27.1-1. Fixed in: 3.30.2-1. Group: AVG-248. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Ubuntu 18.04 — yara — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — yara — multiple vulnerabilities (17 CVEs) — patch and remediation guide

  • March 28, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 28 March 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8080-1 Related CVEs: CVE-2018-19976 CVE-2017-9304 CVE-2018-19974 CVE-2017-8294 CVE-2018-12034 CVE-2017-8929 CVE-2021-45429 CVE-2017-11328  +9 more Upstream summary: Kamil Frankowicz discovered that a number of YARA's functions generated memory exceptions when processing specially […]

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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-2020-5996)

  • March 28, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 28 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5996 Related CVEs: CVE-2020-8695 CVE-2020-25704 CVE-2020-27673 CVE-2020-25656 CVE-2020-28915 CVE-2020-25668 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Install Ruby on Rails on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Ruby on Rails on Debian 9

  • March 28, 2021
  • Linux
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Introduction How to Install Ruby on Rails 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. […]

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Oracle Linux 8 — go-toolset:ol8 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — go-toolset:ol8 — security and stability fixes — required update (ELSA-2022-1819)

  • March 27, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 27 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1819 Related CVEs: CVE-2021-38297 CVE-2021-41771 CVE-2022-23772 CVE-2022-23806 CVE-2021-41772 CVE-2021-39293 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 121604

Debian 9 – time synchronization fails causing TLS and auth errors

  • March 27, 2021
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 27 March 2021 Affected versions: Debian 9 📖 ~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 113099

Windows Server 2016 – Hyper-V VM networking packet loss caused by VMQ mismatch – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 27 March 2021 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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