🔴 Critical ⏱ 5–30 min Last verified: 21 December 2023 Affected versions: 20.04 📖 ~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 […]
Introduction How to Configure ACLs on Ext4 File Systems on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from […]
🟢 Low ⏱ 5–15 min Last verified: 21 December 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2019-15847 CVE-2023-4039 Upstream summary: The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.5 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2023:2784-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-27545 Upstream summary: libdwarf before 20201017 has a one-byte out-of-bounds read because of an invalid pointer dereference via an invalid line table in a […]
🟠 High ⏱ 15–60 min Last verified: 21 December 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2016-6345 CVE-2016-6346 CVE-2016-6347 CVE-2016-6348 CVE-2016-9606 CVE-2017-7561 CVE-2020-10688 CVE-2020-1695 +2 more Upstream summary: RESTEasy allows remote authenticated users to obtain sensitive information by leveraging "insufficient use of random values" […]
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read • Source: Microsoft KB5032249 • MSRC update-guide entry Related CVEs: CVE-2023-36397 CVE-2023-36036 CVE-2023-36428 CVE-2023-36425 CVE-2023-36424 CVE-2023-36423 CVE-2023-36017 CVE-2023-36705 +9 more Affected components: Windows Server 2016 Windows Server 2016 (Server Core installation) Table of contents Symptom […]
🟢 Low ⏱ 5–15 min Last verified: 21 December 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2023-5157 Upstream summary: A vulnerability was found in MariaDB. An OpenVAS port scan on ports 3306 and 4567 allows a malicious remote client to cause a denial of […]
Introduction Deploying set up automatic security updates on debian 12 on a Debian 12 Bookworm machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure […]
Introduction Setting up implement network segmentation on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Implement Network Segmentation on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to keep in […]
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read • Source: pkgsrc audit-packages entry Related CVEs: CVE-2022-24859 Upstream summary: pkgsrc audit-packages flagged py{27,36,37,38,39,310}-PDF2<1.27.5 for vulnerability class 'denial-of-service'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2022-24859 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]
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