How to Set Up a Firewall with UFW on Ubuntu
Learn how to set up and manage a firewall on Ubuntu using UFW. This guide covers installation, configuration, and essential rules to secure your server.
Oracle Linux 9 — nginx — vulnerability — patch and remediation guide (ELSA-2023-5711)
🟡 Medium ⏱ 10–30 min Last verified: 1 February 2023 Affected versions: Oracle Linux 9 📖 ~4 min read • Source: ELSA advisory ELSA-2023-5711 Related CVEs: CVE-2023-44487 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
openSUSE Tumbleweed — libsass — multiple vulnerabilities (15 CVEs) — patch and remediation guide
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2019:1791-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-11499 CVE-2018-19827 CVE-2022-26592 CVE-2022-43357 CVE-2022-43358 CVE-2018-19797 CVE-2018-19837 CVE-2018-19838 +7 more Upstream summary: A use-after-free vulnerability exists in handle_error() in sass_context.cpp in LibSass 3.4.x and 3.5.x […]
Cómo instalar Node.js en CentOS 8
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Oracle Linux 9 — Security and bug fixes for NetworkManager (ELSA-2025-0377)
🟡 Medium ⏱ 10–30 min Last verified: 31 January 2023 Affected versions: Oracle Linux 9 📖 ~4 min read • Source: ELSA advisory ELSA-2025-0377 Related CVEs: CVE-2024-3661 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
Debian 11 — dhis-tools-dns — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 31 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2005-3341 Upstream summary: DHIS tools DNS package (dhis-tools-dns) before 5.0 allows local users to overwrite arbitrary files via a symlink attack on temporary files created by (1) register-q.sh […]
AlmaLinux 9 — rpm — multiple vulnerabilities (3 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read • Source: AlmaLinux ALSA ALSA-2024:0463 Related CVEs: CVE-2021-35937 CVE-2021-35938 CVE-2021-35939 Upstream summary: The RPM Package Manager (RPM) is a command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating software packages. Security Fix(es): […]
Debian 11 — flac — multiple vulnerabilities (10 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 31 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2007-4619 CVE-2007-6277 CVE-2007-6278 CVE-2007-6279 CVE-2014-8962 CVE-2014-9028 CVE-2017-6888 CVE-2020-0499 +2 more Upstream summary: Multiple integer overflows in Free Lossless Audio Codec (FLAC) libFLAC before 1.2.1, as used in Winamp […]
openSUSE Tumbleweed — libcjose0 — vulnerability — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2023:3030-1 (see also SUSE bugzilla) Related CVEs: CVE-2023-37464 Upstream summary: OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). The AES GCM decryption routine incorrectly uses the Tag […]
Debian 11 — packer — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 31 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2018-15869 Upstream summary: An Amazon Web Services (AWS) developer who does not specify the –owners flag when describing images via AWS CLI, and therefore not properly validating source […]