DNS

How to Set Up Uptime Kuma for Service Monitoring on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up Uptime Kuma for Service Monitoring on RHEL 9

Uptime Kuma is a self-hosted monitoring tool that provides a clean web dashboard for tracking uptime across HTTP endpoints, TCP ports, DNS records, Docker containers, and more. On RHEL 9, you can run it directly with Node.js and PM2 for process management, or deploy it instantly via Docker. This tutorial walks through both approaches, firewall […]

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Oracle Linux 8 — bind9.16 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bind9.16 — vulnerability — patch and remediation guide (ELSA-2023-5460)

🟠 High   ⏱ 15–60 min  Last verified: 7 June 2024 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-5460 Related CVEs: CVE-2023-3341 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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Common Problems 114467

Kernel Module Missing After RHEL 9 Update

🟡 Medium   ⏱ 5–30 min  Last verified: 4 June 2024 📖 ~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 & Cross-Refs References & Further […]

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

Oracle Linux 8 — bind — vulnerability — patch and remediation guide (ELSA-2024-5524)

🟠 High   ⏱ 15–60 min  Last verified: 1 June 2024 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-5524 Related CVEs: CVE-2024-1975 CVE-2024-1737 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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Debian 12 — rpcbind — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — rpcbind — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 May 2024 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-2061 CVE-2010-2064 CVE-2015-7236 CVE-2017-8779 Upstream summary: rpcbind 0.2.0 does not properly validate (1) /tmp/portmap.xdr and (2) /tmp/rpcbind.xdr, which can be created by an attacker before the daemon is […]

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Alpine Linux 3.18 — gdnsd — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — gdnsd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 2.4.3-r0 📖 ~4 min read  •  Source: Alpine secdb entry — gdnsd 2.4.3-r0 Related CVEs: CVE-2019-13952 Upstream summary: Alpine community repository for vv3.18 ships gdnsd 2.4.3-r0 which addresses CVE-2019-13952. Table of contents Symptom & Impact Environment […]

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Common Problems 114500

NFS Mount Permission Denied on RHEL 9 Client

🟡 Medium   ⏱ 5–30 min  Last verified: 26 May 2024 📖 ~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 & Cross-Refs References & Further […]

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Alpine Linux 3.18 — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — pdns-recursor — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 4.9.3-r0 📖 ~4 min read  •  Source: Alpine secdb entry — pdns-recursor 4.9.3-r0 Related CVEs: CVE-2023-50387 CVE-2023-50868 CVE-2023-22617 CVE-2022-37428 CVE-2022-27227 CVE-2020-25829 CVE-2020-14196 CVE-2020-10995  +12 more Upstream summary: Alpine community repository for vv3.18 ships pdns-recursor 4.9.3-r0 which […]

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Ubuntu 16.04 — unbound — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — unbound — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 May 2024 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7080-1 Related CVEs: CVE-2024-8508 CVE-2024-43167 CVE-2024-43168 CVE-2017-15105 Upstream summary: Toshifumi Sakaguchi discovered that Unbound incorrectly handled name compression for large RRsets, which could lead to excessive CPU usage. An attacker […]

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Alpine Linux 3.18 — rpcbind — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — rpcbind — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 0.2.4-r0 📖 ~4 min read  •  Source: Alpine secdb entry — rpcbind 0.2.4-r0 Related CVEs: CVE-2017-8779 Upstream summary: Alpine main repository for vv3.18 ships rpcbind 0.2.4-r0 which addresses CVE-2017-8779. Table of contents Symptom & Impact Environment […]

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