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Gentoo Linux — net-misc/nextcloud-client — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-misc/nextcloud-client — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202105-37 Related CVEs: CVE-2021-22879 CVE-2020-8189 CVE-2020-8224 CVE-2020-8227 Upstream summary: It was discovered that Nextcloud Desktop Client did not validate URLs. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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How to Secure the MariaDB Installation on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Secure the MariaDB Installation on Debian 9

Introduction This guide explains how to Secure the MariaDB Installation on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with the […]

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FreeBSD 13 — libsixel — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — libsixel — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 April 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Memory leak in different components Related CVEs: CVE-2018-14072 CVE-2018-14073 Upstream summary: MITRE reports: bsixel 1.8.1 has a memory leak in sixel_decoder_decode in decoder.c, image_buffer_resize in fromsixel.c, sixel_decode_raw in fromsixel.c and […]

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Oracle Linux 8 — java-1.8.0-openjdk — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-1.8.0-openjdk — security and stability fixes — required update (ELSA-2023-4176)

🟡 Medium   ⏱ 10–30 min  Last verified: 29 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-4176 Related CVEs: CVE-2023-22045 CVE-2023-22049 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Common Problems 117949

Ubuntu 18.04 LTS SSH Login Fails with Permission Denied

🟠 High   ⏱ 5–30 min  Last verified: 29 April 2021 Affected versions: 18.04 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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FreeBSD 13 — py26-graphite-web — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py26-graphite-web — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 April 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-graphite-web — Multiple vulnerabilities Related CVEs: CVE-2013-5093 Upstream summary: Graphite developers report: This release contains several security fixes for cross-site scripting (XSS) as well as a fix for a remote-execution […]

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How to Set Up ModSecurity WAF on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up ModSecurity WAF on SLES 12

Introduction This tutorial covers How to Set Up ModSecurity WAF on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper […]

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AlmaLinux 8 — spacewalk-abrt — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — spacewalk-abrt — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2019:3355 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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