Security Hardening

Debian 13 — jupyter-server — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — jupyter-server — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 1 October 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-26232 CVE-2020-26275 CVE-2022-24757 CVE-2022-29241 CVE-2023-39968 CVE-2023-40170 CVE-2023-49080 CVE-2025-61669  +3 more Upstream summary: Jupyter Server before version 1.0.6 has an Open redirect vulnerability. A maliciously crafted link to a […]

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Common Problems 123987

Oracle Linux 10 – firewalld rich rule not applied after reload – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 1 October 2025 Affected versions: Oracle Linux 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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Debian 13 — xmedcon — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — xmedcon — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 October 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2024-29421 CVE-2025-2581 Upstream summary: xmedcon 0.23.0 and fixed in v.0.24.0 is vulnerable to Buffer Overflow via libs/dicom/basic.c which allows an attacker to execute arbitrary code. Table of contents […]

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How to Configure DNS with Unbound on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Configure DNS with Unbound on Debian 13

Introduction Deploying configure dns with unbound on a Debian 13 Trixie machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure Debian 13 Trixie is […]

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NetBSD 10.0 — kdebase-3.4.[01] — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — kdebase — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Upstream summary: pkgsrc audit-packages flagged kdebase{,nb*} for vulnerability class 'local-privilege-escalation'. Reference: http://www.kde.org/info/security/advisory-20050905-1.txt Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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Debian 13 — python-socketio — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — python-socketio — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 October 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-61765 Upstream summary: python-socketio is a Python implementation of the Socket.IO realtime client and server. A remote code execution vulnerability in python-socketio versions prior to 5.14.0 allows attackers to […]

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Debian 13 — tang — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — tang — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 October 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-4076 CVE-2023-1672 Upstream summary: A flaw exists in tang, a network-based cryptographic binding server, which could result in leak of private keys. Table of contents Symptom & Impact […]

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NetBSD 10.0 — cyrus-imapd-2.2.[0-7] — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — cyrus-imapd — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Upstream summary: pkgsrc audit-packages flagged cyrus-imapd{,nb*} for vulnerability class 'remote-code-execution'. Reference: http://security.e-matters.de/advisories/152004.txt Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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How to Configure PostgreSQL Streaming Replication on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure PostgreSQL Streaming Replication on RHEL 10

Introduction This tutorial demonstrates how to Configure PostgreSQL Streaming Replication on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream repositories […]

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Common Problems 119656

Debian 13 MySQL InnoDB Crash Recovery Loop

🔴 Critical   ⏱ 5–30 min  Last verified: 1 October 2025 Affected versions: Debian 13 📖 ~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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