Operations

Gentoo Linux — media-plugins/live — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — media-plugins/live — multiple vulnerabilities (12 CVEs) — patch and remediation guide

  • February 18, 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-202407-23 Related CVEs: CVE-2020-24027 CVE-2021-38380 CVE-2021-38381 CVE-2021-38382 CVE-2021-39282 CVE-2021-39283 CVE-2018-4013 CVE-2019-15232  +4 more Upstream summary: Multiple vulnerabilities have been discovered in LIVE555 Media Server. Please review the CVE identifiers referenced below for […]

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Ubuntu 18.04 — hivex — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — hivex — vulnerability — patch and remediation guide

  • February 18, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 18 February 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5148-1 Related CVEs: CVE-2021-3504 Upstream summary: It was discovered that hivex incorrectly handled certain input. An attacker could use this vulnerability to cause a crash or obtain sensitive information. Table […]

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Ubuntu 18.04 — http-parser — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — http-parser — vulnerability — patch and remediation guide

  • February 18, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 18 February 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5563-1 Related CVEs: CVE-2020-8287 Upstream summary: It was discovered that http-parser incorrectly handled certain requests. An attacker could possibly use this issue to bypass security controls or gain unauthorized access […]

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Oracle Linux 8 — zsh — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — zsh — vulnerability — patch and remediation guide (ELSA-2022-2120)

  • February 18, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 18 February 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-2120 Related CVEs: CVE-2021-45444 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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Common Problems 125213

Oracle Linux 8 – Common Problem 025 – Diagnosis and Fix

  • February 17, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 17 February 2021 Affected versions: Oracle Linux 8 📖 ~3 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 117541

Ubuntu 20.04 LTS – UFW policy change blocks SSH and remote administration – Fix & Prevention

  • February 17, 2021
  • Linux
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🔴 Critical   ⏱ 5–30 min  Last verified: 17 February 2021 Affected versions: Ubuntu 20.04 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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Common Problems 115101

RHEL 8 multipathd Path Flapping Producing Intermittent IO Delays

  • February 17, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 17 February 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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How to Set Up a Bond Network Interface on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up a Bond Network Interface on Oracle Linux 8

Introduction Setting up set up a bond network interface on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up a Bond Network Interface on Oracle Linux 8, with all the commands you need, the SELinux […]

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How to Use instfix to Check Installed Fixes on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use instfix to Check Installed Fixes on IBM AIX 7.2

  • February 17, 2021
  • IBM AIX
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Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use instfix to check installed fixes on ibm aix […]

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Ubuntu 18.04 — libspf2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libspf2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • February 17, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 17 February 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6584-1 Related CVEs: CVE-2021-20314 CVE-2021-33912 CVE-2021-33913 Upstream summary: Philipp Jeitner and Haya Shulman discovered that Libspf2 incorrectly handled certain inputs. If a user or an automated system were tricked into […]

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