How the Iptables Firewall Works
The iptables firewall is a good way to protect your server from unwanted traffic from the internet. In this guide, we’ll discuss the general idea behind the iptables firewall and how rules interact with each other.
How to Configure Oracle Linux 9 for Oracle RAC
Introduction How to Configure Oracle Linux 9 for Oracle RAC on Oracle Linux 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 […]
AlmaLinux 8 — pandoc — multiple vulnerabilities (3 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALSA-2022:5597 Related CVEs: CVE-2022-24724 CVE-2023-24824 CVE-2020-5238 Upstream summary: Pandoc is a markdown/markup conversion tool. The version of pandoc in AlmaLinux 8 CRB uses cmark-gfm (GitHub's extended version of the C reference implementation […]
Oracle Linux 9 — Unbreakable Enterprise kernel — bug fix update — issues resolved (ELSA-2026-50170)
🟡 Medium ⏱ 5–30 min Last verified: 13 April 2023 Affected versions: Oracle Linux 9 📖 ~4 min read • Source: ELSA advisory ELSA-2026-50170 Related CVEs: CVE-2026-23401 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
IBM AIX 7.3 — CVE-2022-42439 — vulnerability — patch and remediation guide
🟡 Medium ⏱ 15–45 min Last verified: 13 April 2023 Affected versions: IBM AIX 7.3 📖 ~4 min read • Source: NVD CVE-2022-42439, IBM Support Bulletin CVE: CVE-2022-42439 NVD summary: IBM App Connect Enterprise 11.0.0.17 through 11.0.0.19 and 12.0.4.0 and 12.0.5.0 contains an unspecified vulnerability in the Discovery Connector nodes which may cause a […]
IBM AIX 7.3 — CVE-2000-0466 — vulnerability — patch and remediation guide
🟠 High ⏱ 30–90 min Last verified: 13 April 2023 Affected versions: IBM AIX 7.3 📖 ~4 min read • Source: NVD CVE-2000-0466, IBM PSIRT advisory page CVE: CVE-2000-0466 NVD summary: AIX cdmount allows local users to gain root privileges via shell metacharacters. References: www.securityfocus.com/bid/1384 xforce.iss.net/alerts/advise55.php www.securityfocus.com/bid/1384 Table of contents Symptom & […]
Amazon Linux 2 — scipy — vulnerability — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read • Source: Amazon Linux advisory ALAS2-2023-2160 Related CVEs: CVE-2023-29824 Upstream summary: A use-after-free issue was discovered in Py_FindObjects() function in SciPy versions prior to 1.8.0. (CVE-2023-29824) Table of contents Symptom & Impact Environment & Reproduction […]
FreeBSD 13 — fish — multiple vulnerabilities (6 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 13 April 2023 Affected versions: FreeBSD 13 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: shells/fish — arbitrary code execution via git Related CVEs: CVE-2014-2905 CVE-2014-2906 CVE-2014-2914 CVE-2014-3219 CVE-2014-3856 CVE-2022-20001 Upstream summary: Peter Ammon reports: fish is a command line shell. fish version 3.1.0 through […]
Debian 11 — guava-libraries — multiple vulnerabilities (3 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 13 April 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2018-10237 CVE-2020-8908 CVE-2023-2976 Upstream summary: Unbounded memory allocation in Google Guava 11.0 through 24.x before 24.1.1 allows remote attackers to conduct denial of service attacks against servers that […]
openSUSE Tumbleweed — cri-o — multiple vulnerabilities (2 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory SUSE-CU-2023:3473-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-1708 CVE-2019-10214 Upstream summary: A vulnerability was found in CRI-O that causes memory or disk space exhaustion on the node for anyone with access to […]
