Linux

Ubuntu 20.04 — librecad — multiple vulnerabilities (7 CVEs) — patch and remediation guide

• January 9, 2022
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 9 January 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5957-1 Related CVEs: CVE-2018-19105 CVE-2021-21898 CVE-2021-21899 CVE-2021-21900 CVE-2021-45341 CVE-2021-45342 CVE-2021-45343 Upstream summary: Cody Sixteen discovered that LibreCAD incorrectly handled memory when parsing DXF files. An attacker could use this issue […]

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An Introduction to SELinux on CentOS 7 – Part 3: Users

• January 9, 2022
• Linux
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This is the third article in the Introduction to SELinux series. This article focuses on SELinux users and role-based access. Learn how to check logs and resolve errors.

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Oracle Linux 8 — dotnet5.0 security and bugfix update (ELSA-2021-2036)

• January 8, 2022
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 8 January 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2036 Related CVEs: CVE-2021-31204 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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Ubuntu 14.04 LTS swap thrashing causes severe performance degradation

• January 8, 2022
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 8 January 2022 Affected versions: 14.04 📖 ~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 […]

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How to Configure Multipath I/O on CentOS Stream 9

• January 8, 2022
• CentOS
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Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure multipath i/o on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Multipath I/O on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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Ubuntu 18.04 LTS – PHP-FPM pool crashes under load with memory limit issues – Fix & Prevention

• January 8, 2022
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 8 January 2022 Affected versions: Ubuntu 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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How To Set Up Django with Postgres, Nginx, and Gunicorn on Debian 8

• January 8, 2022
• Linux
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Django is a powerful web framework that can help you get your Python application or website off the ground. Django includes a simplified development server for testing your code locally, but for anything even slightly production related, a more secure and powerful web server…

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Обеспечение безопасности Apache с помощью Let’s Encrypt в Ubuntu 20.04

• January 8, 2022
• Linux
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Let’s Encrypt — это центр сертификации, упрощающий получение и установку бесплатных сертификатов TLS/SSL, обеспечивая шифрование HTTPS на веб-серверах. Это…

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Alpine Linux edge — py3-sqlparse — vulnerability — patch and remediation guide

• January 8, 2022
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.4.2-r0 📖 ~4 min read  •  Source: Alpine secdb entry — py3-sqlparse 0.4.2-r0 Related CVEs: CVE-2021-32839 Upstream summary: Alpine community repository for vedge ships py3-sqlparse 0.4.2-r0 which addresses CVE-2021-32839. Table of contents Symptom & Impact Environment […]

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How to Configure PAM on RHEL 7

• January 8, 2022
• Linux
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How to Configure PAM on RHEL 7 Pluggable Authentication Modules (PAM) is the authentication framework that underlies almost every login mechanism on Red Hat Enterprise Linux 7. When a user runs su, logs in over SSH, unlocks a screensaver, or authenticates to any PAM-aware application, the PAM stack determines whether that authentication succeeds, what restrictions […]

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