Debian 12 Bookworm

How to Configure NTP Time Synchronization on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure NTP Time Synchronization on Debian 12

Introduction Deploying configure ntp time synchronization on debian 12 on a Debian 12 Bookworm 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 You will […]

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Common Problems 120006

Debian 12 SSH Login Rejected After Hardening Policy Change

🟠 High   ⏱ 5–30 min  Last verified: 21 July 2023 Affected versions: Debian 12 📖 ~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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How to Set Up Victoriametrics on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up Victoriametrics on Debian 12

Introduction This guide explains how to Set Up Victoriametrics on Debian 12 on Debian 12 Bookworm. Debian Bookworm uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 12 install with the standard […]

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Debian 12 — zangband — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — zangband — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 July 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-40589 Upstream summary: ZAngband zangband-data 2.7.5 is affected by an integer underflow vulnerability in src/tk/plat.c through the variable fileheader.bfOffBits. Table of contents Symptom & Impact Environment & Reproduction […]

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Debian 12 — trickle — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — trickle — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 July 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-0415 Upstream summary: Untrusted search path vulnerability in trickle 1.07 allows local users to execute arbitrary code via a Trojan horse trickle-overload.so in the current working directory, which […]

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How to Configure Pyenv for Multiple Python Versions on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure Pyenv for Multiple Python Versions on Debian 12

Introduction How to Configure Pyenv for Multiple Python Versions on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from […]

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Debian 12 — x11vnc — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — x11vnc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 July 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-29074 Upstream summary: scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user. Table of contents Symptom & Impact […]

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Debian 12 — libphp-phpmailer — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libphp-phpmailer — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 20 July 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-1807 CVE-2007-3215 CVE-2015-8476 CVE-2016-10033 CVE-2017-11503 CVE-2017-5223 CVE-2018-19296 CVE-2020-13625  +2 more Upstream summary: The Data function in class.smtp.php in PHPMailer 1.7.2 and earlier allows remote attackers to cause a […]

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How to Configure Woodpecker CI on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure Woodpecker CI on Debian 12

Introduction How to Configure Woodpecker CI on Debian 12 is a fundamental operation for any administrator maintaining a Debian 12 Bookworm server. Debian 12 Bookworm ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. This […]

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Debian 12 — ruby-commonmarker — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — ruby-commonmarker — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 20 July 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-5238 CVE-2022-24724 CVE-2022-39209 CVE-2023-22483 CVE-2023-22484 CVE-2023-22485 CVE-2023-22486 CVE-2023-24824  +3 more Upstream summary: The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to […]

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