January 2022 - Page 9 of 72

How to Set Up Buildkite Agent on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Buildkite Agent on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying set up buildkite agent on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Buildkite Agent on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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FreeBSD 12 — rubygem-rdoc — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — rubygem-rdoc — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: RDoc — command injection vulnerability Related CVEs: CVE-2012-6708 CVE-2015-9251 CVE-2021-31799 Upstream summary: Alexandr Savca reports: RDoc used to call Kernel#open to open a local file. If a Ruby project has […]

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Common Problems 112419

Windows Server 2019 — DNS scavenging does not remove stale records — Fix & Prevention

🟢 Low   ⏱ 5–30 min  Last verified: 29 May 2026 Affected versions: Windows Server 2019 📖 ~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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Debian 11 — sa-exim — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — sa-exim — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2006-1251 CVE-2019-19920 Upstream summary: Argument injection vulnerability in greylistclean.cron in sa-exim 4.2 allows remote attackers to delete arbitrary files via an email with a To field that contains […]

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How to Install SaltStack on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Install SaltStack on SLES 12

Introduction This tutorial covers How to Install SaltStack on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper refresh && […]

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FreeBSD 13 — hsftp — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — hsftp — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: hsftp format string vulnerabilities Upstream summary: Ulf Härnhammar discovered a format string bug in hsftp's file listing code may allow a malicious server to cause arbitrary code execution by the […]

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SLES 15 — osasnmpd — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — osasnmpd — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:0776-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-25316 Upstream summary: A Insecure Temporary File vulnerability in s390-tools of SUSE Linux Enterprise Server 12-SP5, SUSE Linux Enterprise Server 15-SP2 allows local attackers to […]

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How To Install Node.js on Rocky Linux 8 — step-by-step Linux tutorial on Progressive Robot

How To Install Node.js on Rocky Linux 8

In this guide, we will show you three different ways of getting Node.js installed on a Rocky Linux 8 server: using `dnf` to install the `nodejs` package from Rocky’s default AppStream repository; installing via the NodeSource repository; installing `nvm`, the Node Version Manager, and using it to install and manage multiple versions of `node`

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Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel-container — vulnerability — patch and remediation guide (ELSA-2021-9421)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9421 Related CVEs: CVE-2021-3656 CVE-2021-3653 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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