Systemd Services

Alpine Linux edge — syncthing — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — syncthing — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.15.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — syncthing 1.15.1-r0 Related CVEs: CVE-2021-21404 Upstream summary: Alpine community repository for vedge ships syncthing 1.15.1-r0 which addresses CVE-2021-21404. Table of contents Symptom & Impact Environment […]

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How to Deploy a Spring Boot Application on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Deploy a Spring Boot Application on Oracle Linux 8

Introduction Setting up deploy a spring boot application 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 Deploy a Spring Boot Application on Oracle Linux 8, with all the commands you need, the SELinux and firewalld […]

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Ubuntu 16.04 — libnet-cidr-perl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libnet-cidr-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 May 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8110-1 Related CVEs: CVE-2021-4456 Upstream summary: Dave Rolsky discovered that Net-CIDR did not properly sanitize IP addresses. An attacker could possibly use this to bypass IP-based restrictions. Table of contents […]

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AlmaLinux 8 — libexif — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — libexif — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2020:5393 Related CVEs: CVE-2020-0452 Upstream summary: The libexif packages provide a library for extracting extra information from image files. Security Fix(es): * libexif: out of bounds write due to an integer overflow […]

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SLES 15 — libvirglrenderer1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libvirglrenderer1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 May 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-8002 CVE-2020-8003 CVE-2019-18392 Upstream summary: A NULL pointer dereference in vrend_renderer.c in virglrenderer through 0.8.1 allows attackers to cause a denial of service via commands […]

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FreeBSD 13 — opera — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — opera — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 22 May 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: opera — moderately severe issue Related CVEs: CVE-2004-0411 CVE-2004-0717 CVE-2004-0718 CVE-2004-0721 CVE-2004-1156 CVE-2004-1157 CVE-2004-1158 CVE-2004-1160  +12 more Upstream summary: Opera reports: Fixed a moderately severe issue, as reported by Attila […]

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How to Install Jupyter Notebook on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Jupyter Notebook on RHEL 7

How to Install Jupyter Notebook on RHEL 7 Jupyter Notebook is a browser-based interactive computing environment used extensively in data science, machine learning, and scientific research. It allows you to write Python code, run it in cells, visualize data inline, and document your analysis—all in one place. This guide covers two installation methods on Red […]

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Oracle Linux 8 — bash — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bash — security and stability fixes — required update (ELSA-2021-1679)

🟢 Low   ⏱ 5–15 min  Last verified: 21 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1679 Related CVEs: CVE-2019-18276 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 117402

Ubuntu 20.04 LTS – apt update fails with Release file not valid yet – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 21 May 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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AlmaLinux 8 — google-noto-cjk-fonts — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — google-noto-cjk-fonts — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2019:3367 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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