Security Hardening

FreeBSD 12 — ImageMagick7-nox — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — ImageMagick7-nox — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • April 11, 2021
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 11 April 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ImageMagick7 — multiple vulnerabilities Related CVEs: CVE-2016-3714 CVE-2016-3715 CVE-2016-3716 CVE-2016-3717 CVE-2016-3718 CVE-2016-8862 CVE-2016-8866 CVE-2016-9298  +12 more Upstream summary: CVE reports: Several vulnerabilities have been discovered in ImageMagick: CVE-2021-20313: A flaw […]

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Amazon Linux 2 — kernel-livepatch-4.14.165-131.185 — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.165-131.185 — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • April 11, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2020-001 Related CVEs: CVE-2019-1591 CVE-2019-15918 CVE-2020-10942 CVE-2020-8648 CVE-2019-20096 Upstream summary: An issue was discovered in the Linux kernel before 5.0.10. SMB2_negotiate in fs/cifs/smb2pdu.c has an out-of-bounds read because data structures […]

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Oracle Linux 8 — ruby:3.1 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ruby:3.1 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2024-1431)

  • April 10, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-1431 Related CVEs: CVE-2023-28756 CVE-2023-28755 CVE-2021-33621 CVE-2023-36617 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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Gentoo Linux — app-admin/vault — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-admin/vault — multiple vulnerabilities (13 CVEs) — patch and remediation guide

  • April 10, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202207-01 Related CVEs: CVE-2020-25594 CVE-2021-27668 CVE-2021-3024 CVE-2021-3282 CVE-2021-32923 CVE-2021-37219 CVE-2021-38553 CVE-2021-38554  +5 more Upstream summary: Multiple vulnerabilities have been discovered in HashiCorp Vault. Please review the CVE identifiers referenced below for details. […]

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Common Problems 119150

Ubuntu 14.04 LTS Redis service refuses connections due to overcommit settings

  • April 10, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 10 April 2021 Affected versions: 14.04 📖 ~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 […]

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How to Configure Jaeger Distributed Tracing on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Jaeger Distributed Tracing on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying configure jaeger distributed tracing on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Jaeger Distributed Tracing on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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Common Problems 115408

RHEL 7 Legacy service Script Returns status dead

  • April 10, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 10 April 2021 📖 ~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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Gentoo Linux — net-libs/tox — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-libs/tox — vulnerability — patch and remediation guide

  • April 10, 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-202403-01 Related CVEs: CVE-2021-44847 Upstream summary: A vulnerability has been discovered in btrbk. Please review the CVE identifier referenced below for details. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Common Problems 113515

Windows Server 2012 R2 — Static routes lost after reboot due to persistent store misconfiguration in Server 2019 — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 10 April 2021 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

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Arch Linux — powerdns — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — powerdns — multiple vulnerabilities (11 CVEs) — patch and remediation guide

  • April 10, 2021
  • 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-201903-13 Related CVEs: CVE-2019-3871 CVE-2018-1046 CVE-2021-36754 CVE-2018-14626 CVE-2018-10851 CVE-2016-7074 CVE-2016-7073 CVE-2016-7072  +3 more Upstream summary: Type: insufficient validation. Status: Fixed. Affected: 4.1.6-2. Fixed in: 4.1.7-1. Group: AVG-927. Table of contents […]

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