Systemd Services

Gentoo Linux — dev-java/oracle-jre-bin — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-java/oracle-jre-bin — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • August 17, 2020
  • 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-202209-15 Related CVEs: CVE-2020-2585 CVE-2020-2755 CVE-2020-2756 CVE-2020-2757 CVE-2020-2773 CVE-2020-2781 CVE-2020-2800 CVE-2020-2803  +12 more Upstream summary: Multiple vulnerabilities have been discovered in Oracle's JDK and JRE software suites. Please review the CVE identifiers […]

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How to Configure IBM PowerVM Hypervisor on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure IBM PowerVM Hypervisor on IBM AIX 7.2

  • August 17, 2020
  • 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 configure ibm powervm hypervisor on ibm aix 7.2 on […]

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How to Configure AppArmor Profiles on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure AppArmor Profiles on Debian 10

  • August 17, 2020
  • Linux
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Introduction How to Configure AppArmor Profiles 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. This […]

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openSUSE Tumbleweed — python36-Flask-Cors — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-Flask-Cors — vulnerability — patch and remediation guide

  • August 16, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:1393-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-25032 Upstream summary: An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to access private resources […]

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Ubuntu 20.04 — spice — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — spice — vulnerability — patch and remediation guide

  • August 16, 2020
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 16 August 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4572-1 Related CVEs: CVE-2020-14355 Upstream summary: Frediano Ziglio discovered that Spice incorrectly handled QUIC image decoding. A remote attacker could use this to cause Spice to crash, resulting in a […]

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How to Configure Nginx Server Blocks on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Nginx Server Blocks on Debian 10

  • August 16, 2020
  • Linux
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Introduction This guide explains how to Configure Nginx Server Blocks on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the […]

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Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide (ELSA-2020-0202)

  • August 16, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 16 August 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0202 Related CVEs: CVE-2020-2601 CVE-2020-2659 CVE-2020-2604 CVE-2020-2590 CVE-2020-2593 CVE-2020-2583 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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

Oracle Linux 8 — glibc — vulnerability — patch and remediation guide (ELSA-2019-4851)

  • August 16, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 16 August 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-4851 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 […]

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Common Problems 118505

AppArmor Denials Break Application Behavior

🟡 Medium   ⏱ 5–30 min  Last verified: 15 August 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 115046

RHEL 8 Apache httpd Fails To Start Because Port Already In Use

  • August 15, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 15 August 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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