Debian 11

Common Problems 120633

Debian 11: Fail2ban blocks internal monitoring IPs

🟡 Medium   ⏱ 5–30 min  Last verified: 22 March 2022 Affected versions: Debian 11 📖 ~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 — uglify-js — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — uglify-js — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-37598 Upstream summary: Prototype pollution vulnerability in function DEFNODE in ast.js in mishoo UglifyJS 3.13.2 via the name variable in ast.js. NOTE: the vendor considers this an invalid […]

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How to Encrypt Disk Partitions with LUKS on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Encrypt Disk Partitions with LUKS on Debian 11

Introduction How to Encrypt Disk Partitions with LUKS on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 […]

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

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

🟠 High   ⏱ 15–60 min  Last verified: 22 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-2685 CVE-2011-2713 CVE-2012-1149 CVE-2012-2334 CVE-2012-2665 CVE-2012-4233 CVE-2012-5639 CVE-2013-2189  +12 more Upstream summary: Stack-based buffer overflow in the Lotus Word Pro import filter in LibreOffice before 3.3.3 allows remote […]

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Debian 11 — python-django-celery-results — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — python-django-celery-results — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-17495 Upstream summary: django-celery-results through 1.2.1 stores task results in the database. Among the data it stores are the variables passed into the tasks. The variables may contain […]

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Debian 11 — tre — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — tre — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-8859 Upstream summary: Multiple integer overflows in the TRE library and musl libc allow attackers to cause memory corruption via a large number of (1) states or (2) […]

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Common Problems 120663

Debian 11: rsync over SSH fails after host key rotation

🟡 Medium   ⏱ 5–30 min  Last verified: 21 March 2022 Affected versions: Debian 11 📖 ~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 Enable AppArmor on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Enable AppArmor on Debian 11

Introduction How to Enable AppArmor on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 11. This tutorial […]

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Debian 11 — davfs2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — davfs2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-1774 CVE-2013-4362 Upstream summary: WEB-DAV Linux File System (davfs2) 0.2.3 does not properly enforce Unix permissions, which allows local users to write arbitrary files on a davfs2 mounted […]

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