Introduction How to Configure Fail2ban on CentOS Stream 9 on CentOS Stream 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]
🟡 Medium ⏱ 10–30 min Last verified: 10 February 2022 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-4257 Related CVEs: CVE-2021-30641 CVE-2021-26690 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALBA-2020:4499 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 […]
🟡 Medium ⏱ 15–45 min Last verified: 10 February 2022 Affected versions: IBM AIX 7.2 📖 ~4 min read • Source: NVD CVE-2022-47983, IBM Support Bulletin CVE: CVE-2022-47983 NVD summary: IBM InfoSphere Information Server 11.7 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus […]
🟡 Medium ⏱ 10–30 min Last verified: 10 February 2022 Affected versions: FreeBSD 13 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: imap-uw — University of Washington IMAP c-client Remote Format String Vulnerability Related CVEs: CVE-2005-0198 CVE-2005-2933 CVE-2008-5514 Upstream summary: SecurityFocus reports: University of Washington IMAP c-client is prone to a remote […]
Introduction How to Set Up a Certificate Authority with OpenSSL on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALBA-2021:1801 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 […]
🟡 Medium ⏱ 10–30 min Last verified: 10 February 2022 Affected versions: FreeBSD 13 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: spamassassin — Malicious rule configuration (.cf) files can be configured to run system commands Related CVEs: CVE-2016-1238 CVE-2017-15705 CVE-2018-11780 CVE-2018-11781 CVE-2018-11805 CVE-2019-12420 CVE-2020-1930 CVE-2020-1931 +1 more Upstream summary: The Apache […]
🟢 Low ⏱ 5–15 min Last verified: 10 February 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2008-5262 CVE-2009-3994 Upstream summary: Multiple stack-based buffer overflows in the iGetHdrHeader function in src-IL/src/il_hdr.c in DevIL 1.7.4 allow context-dependent attackers to execute arbitrary code via a crafted Radiance […]
🟢 Low ⏱ 5–15 min Last verified: 10 February 2022 Affected versions: FreeBSD 13 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: php — open_basedir Race Condition Vulnerability Related CVEs: CVE-2006-5178 Upstream summary: Stefan Esser reports: PHP's open_basedir feature is meant to disallow scripts to access files outside a set of configured […]
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