Operations

Ubuntu 16.04 — whoopsie — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — whoopsie — multiple vulnerabilities (6 CVEs) — patch and remediation guide

  • October 26, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 26 October 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4450-1 Related CVEs: CVE-2020-11937 CVE-2020-12135 CVE-2020-15570 https://launchpad.net/bugs/1850608 CVE-2019-11484 CVE-2019-11476 Upstream summary: Seong-Joong Kim discovered that Whoopsie incorrectly handled memory. A local attacker could use this issue to cause Whoopsie to […]

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Oracle Linux 8 — openssl security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — openssl security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2019-3700)

  • October 25, 2020
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3700 Related CVEs: CVE-2018-0734 CVE-2018-0735 CVE-2019-1543 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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Common Problems 117397

Ubuntu 20.04 Stuck on Boot Splash After Updates

  • October 25, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 25 October 2020 📖 ~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 115022

RHEL 8 Subscription-Manager Shows Repositories Disabled Unexpectedly

  • October 25, 2020
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 25 October 2020 Affected versions: 8.4 8.5 8.6 8.7 8.8 8.9 8.10 📖 ~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 […]

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Common Problems 114930

Systemd service fails to start with unit errors

🟡 Medium   ⏱ 5–30 min  Last verified: 25 October 2020 📖 ~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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How to Install Packer on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Install Packer on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying install packer on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Install Packer on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Arch Linux — lib32-freetype2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — lib32-freetype2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • October 25, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202010-11 Related CVEs: CVE-2020-15999 CVE-2017-8287 CVE-2017-8105 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 2.10.3-1. Fixed in: 2.10.4-1. Group: AVG-1255. Table of contents Symptom & Impact Environment & Reproduction […]

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

Arch Linux — gnupg — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • October 25, 2020
  • 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-202009-5 Related CVEs: CVE-2020-25125 CVE-2018-12020 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 2.2.21-2. Fixed in: 2.2.23-1. Group: AVG-1218. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Ubuntu 14.04 — intel-microcode — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — intel-microcode — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • October 25, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 October 2020 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4985-1 Related CVEs: CVE-2020-24511 CVE-2020-24512 CVE-2020-24513 CVE-2020-24489 https://launchpad.net/bugs/1903883 CVE-2020-8695 CVE-2020-8696 CVE-2020-8698  +12 more Upstream summary: It was discovered that some Intel processors may not properly invalidate cache entries used by […]

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Oracle Linux 8 — container-tools:ol8 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — container-tools:ol8 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-2758)

  • October 24, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 24 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-2758 Related CVEs: CVE-2022-30633 CVE-2022-27664 CVE-2022-30632 CVE-2022-30630 CVE-2022-30635 CVE-2022-1962 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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