December 2021 - Page 5 of 71

How to Set Up an OpenVPN Server on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Set Up an OpenVPN Server on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying set up an openvpn server both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up an OpenVPN Server on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Oracle Linux 8 — nginx:1.18 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nginx:1.18 — vulnerability — patch and remediation guide (ELSA-2021-2259)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2259 Related CVEs: CVE-2021-23017 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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IBM AIX 7.3 — CVE-2008-1710 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-2008-1710 — vulnerability — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 25 May 2026 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-2008-1710, IBM Support Bulletin CVE: CVE-2008-1710 NVD summary: Untrusted search path vulnerability in chnfsmnt in IBM AIX 6.1 allows local users to gain privileges via a modified PATH environment variable. References: secunia.com/advisories/29518 […]

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Debian 11 — zoneminder — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — zoneminder — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-0227 CVE-2008-1381 CVE-2008-3880 CVE-2008-3881 CVE-2008-3882 CVE-2008-6755 CVE-2008-6756 CVE-2013-0232  +12 more Upstream summary: Buffer overflow in the zms script in ZoneMinder before 1.19.2 may allow a remote attacker to […]

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How to Set Up a Ceph Storage Cluster on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up a Ceph Storage Cluster on RHEL 7

How to Set Up a Ceph Storage Cluster on RHEL 7 Ceph is an open-source, software-defined storage platform that provides object, block, and filesystem storage in a single unified cluster. Unlike traditional SANs or NAS appliances, Ceph distributes data and metadata across commodity hardware using the CRUSH algorithm, eliminating single points of failure and scaling […]

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AlmaLinux 8 — gcc-toolset-11-systemtap — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — gcc-toolset-11-systemtap — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:1897 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 […]

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Oracle Linux 8 — ibus and glib2 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ibus and glib2 — security and stability fixes — required update (ELSA-2020-1880)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1880 Related CVEs: CVE-2019-14822 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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FreeBSD 12 — lasso — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — lasso — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: lasso — signature checking failure Related CVEs: CVE-2021-28091 Upstream summary: entrouvert reports: When AuthnResponse messages are not signed (which is permitted by the specifiation), all assertion's signatures should be checked, […]

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Common Problems 114112

RHEL 10 – kdump service fails to reserve crashkernel memory – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: RHEL 10 📖 ~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 & […]

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