Operations

CentOS Stream 9 — opensc — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — opensc — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 11 March 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2024:0966 Related CVEs: CVE-2023-5992 CVE-2023-40660 CVE-2023-40661 CVE-2023-4535 CVE-2023-2977 Upstream summary: The OpenSC set of libraries and utilities provides support for working with smart cards. OpenSC focuses on cards that support cryptographic […]

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SLES 12 — libjbig2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libjbig2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 11 March 2023 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2013-6369 CVE-2022-1210 Upstream summary: Stack-based buffer overflow in the jbg_dec_in function in libjbig/jbig.c in JBIG-KIT before 2.1 allows remote attackers to cause a denial of […]

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Oracle Linux 8 — libXpm — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libXpm — vulnerability — patch and remediation guide (ELSA-2023-0379)

🟠 High   ⏱ 15–60 min  Last verified: 11 March 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-0379 Related CVEs: CVE-2022-4883 CVE-2022-46285 CVE-2022-44617 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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How to Install OpenVPN on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install OpenVPN on FreeBSD 12

Introduction Deploying install openvpn on freebsd 12 on a FreeBSD 12 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + […]

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How to Install Zabbix on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Zabbix on RHEL 9

Zabbix is a mature, enterprise-grade open-source monitoring solution capable of tracking thousands of servers, virtual machines, network devices, and applications from a single web interface. It supports agent-based and agentless monitoring, flexible alerting, and detailed graphing out of the box. This tutorial installs Zabbix 6.4 on RHEL 9 using MySQL (MariaDB) as the backend database […]

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Oracle Linux 9 — keylime — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — keylime — vulnerability — patch and remediation guide (ELSA-2022-8444)

🟡 Medium   ⏱ 10–30 min  Last verified: 11 March 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-8444 Related CVEs: CVE-2022-3500 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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How to Set Up PowerShell Remoting on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Set Up PowerShell Remoting on Windows Server 2022

How to Set Up Let’s Encrypt SSL for IIS on Windows Server 2022 Let’s Encrypt is a free, automated certificate authority that issues Domain Validation (DV) SSL certificates valid for 90 days. On Windows Server 2022 with IIS, the most common tools for obtaining and auto-renewing Let’s Encrypt certificates are win-acme (WACS) and Certify The […]

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Oracle Linux 9 — sysstat — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — sysstat — security and stability fixes — required update (ELSA-2023-6569)

🟡 Medium   ⏱ 10–30 min  Last verified: 10 March 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6569 Related CVEs: CVE-2023-33204 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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AlmaLinux 8 — unit-api — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — unit-api — multiple vulnerabilities (4 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-2022:0290 Related CVEs: CVE-2021-4104 CVE-2022-23302 CVE-2022-23305 CVE-2022-23307 Upstream summary: Parfait is a Java performance monitoring library that collects metrics and exposes them through a variety of outputs. It provides APIs for extracting […]

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