Security Hardening

How to Install Redis on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Install Redis on Oracle Linux 8

Introduction How to Install Redis on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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FreeBSD 13 — nwclient — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — nwclient — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 April 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: nwclient — multiple vulnerabilities Related CVEs: CVE-2001-0910 CVE-2002-0113 CVE-2002-0114 Upstream summary: Insecure file permissions, network access control and DNS usage put systems that use Legato NetWorker at risk. When the […]

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openSUSE Tumbleweed — polkit — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — polkit — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2022:0190-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-4034 CVE-2021-3560 CVE-2010-0750 CVE-2011-1485 CVE-2015-3255 CVE-2015-3256 CVE-2018-19788 CVE-2019-6133  +4 more Upstream summary: A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec […]

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Debian 10 — ldb — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — ldb — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 April 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-10730 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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Arch Linux — matrix-appservice-irc — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — matrix-appservice-irc — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202106-51 Related CVEs: CVE-2021-32659 Upstream summary: Type: insufficient validation. Status: Fixed. Affected: 0.26.1-1. Fixed in: 0.27.0-1. Group: AVG-2076. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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Ubuntu 16.04 — tomcat7 — multiple vulnerabilities (15 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — tomcat7 — multiple vulnerabilities (15 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 20 April 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7282-1 Related CVEs: CVE-2017-12616 CVE-2017-12617 CVE-2019-0221 CVE-2020-9484 CVE-2021-25329 CVE-2016-5388 CVE-2018-1336 CVE-2015-5174  +7 more Upstream summary: It was discovered that Tomcat incorrectly handled being configured with HTTP PUTs enabled. A remote […]

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

Oracle Linux 8 — olcne — vulnerability — patch and remediation guide (ELSA-2021-9525)

🟠 High   ⏱ 15–60 min  Last verified: 20 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9525 Related CVEs: CVE-2021-32781 CVE-2021-32778 CVE-2021-32777 CVE-2021-32779 CVE-2021-32780 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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

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

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201810-10 Related CVEs: CVE-2018-10933 CVE-2020-1730 Upstream summary: Type: authentication bypass. Status: Fixed. Affected: 0.8.3-1. Fixed in: 0.8.4-1. Group: AVG-780. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Oracle Linux 8 — grafana security and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — grafana security and — enhancement update — new behaviour and fixes (ELSA-2023-6972)

🟡 Medium   ⏱ 10–30 min  Last verified: 19 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6972 Related CVEs: CVE-2023-3128 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 118922

Ubuntu 14.04 LTS apt-get update fails with NO_PUBKEY errors

🟡 Medium   ⏱ 5–30 min  Last verified: 19 April 2021 Affected versions: 14.04 14.04.6 📖 ~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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CHAT