Ubuntu 22.04

Common Problems 116952

Ubuntu 22.04 suspend and resume issues

🟡 Medium   ⏱ 5–30 min  Last verified: 10 September 2022 📖 ~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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Ubuntu 22.04 — libgd2 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — libgd2 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 September 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7112-1 Related CVEs: CVE-2021-40812 Upstream summary: It was discovered that the GD Graphics Library did not perform proper bounds checking while handling BMP and WebP files. If a user were […]

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How To Protect an Nginx Server with Fail2Ban on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How To Protect an Nginx Server with Fail2Ban on Ubuntu 22.04

In this guide, you will learn how to install `fail2ban` on a Ubuntu 22.04 server and configure it to monitor your Nginx logs for intrusion attempts. Fail2ban can significantly mitigate brute force attacks by creating rules that automatically alter your firewall configuration to ban specific IPs after a certain number of unsuccessful login attempts. This will allow your server to harden itself against these access attempts without intervention from you.

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Common Problems 116917

Ubuntu 22.04 DNS Failures with systemd-resolved Stub Resolver

🟡 Medium   ⏱ 5–30 min  Last verified: 8 September 2022 📖 ~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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Ubuntu 22.04 — zfs-linux — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — zfs-linux — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 September 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6511-1 Related CVEs: CVE-2013-20001 Upstream summary: It was discovered that the OpenZFS sharenfs feature incorrectly handled IPv6 address data. This could result in IPv6 restrictions not being applied, contrary to […]

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Common Problems 117079

Ubuntu 22.04 LTS – grub updates fail after interrupted package transaction

🟠 High   ⏱ 5–30 min  Last verified: 6 September 2022 Affected versions: Ubuntu 22.04 LTS Ubuntu 22.04 Ubuntu 22.04.4 📖 ~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 […]

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Common Problems 117034

Ubuntu 22.04 LTS GDM Login Loop on Desktop Systems

🟡 Medium   ⏱ 5–30 min  Last verified: 3 September 2022 📖 ~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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Ubuntu 22.04 — tinygltf — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — tinygltf — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 September 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7129-1 Related CVEs: CVE-2022-3008 Upstream summary: It was discovered that TinyGLTF performed file path expansion in an insecure way on certain inputs. An attacker could possibly use this issue to […]

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Common Problems 116922

Ubuntu 22.04 Bluetooth device not detected

🟡 Medium   ⏱ 5–30 min  Last verified: 2 September 2022 📖 ~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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