ubuntu

Common Problems 118936

Ubuntu 14.04 LTS – boot drops to initramfs after unclean shutdown – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 September 2022 Affected versions: Ubuntu 14.04 LTS 📖 ~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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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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Microservices Deployment Using Nomad on Ubuntu — step-by-step Linux tutorial on Progressive Robot

Microservices Deployment Using Nomad on Ubuntu

Looking for an efficient tool to deploy microservices? Check out HashiCorp Nomad – a versatile, lightweight scheduler that streamlines application deployment and scaling. With Nomad’s simplicity, scalability, and integration, you can deploy and manage microservices with ease. Learn more about Nomad’s features and capabilities in their official documentation and comparison guide.

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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 18.04 — mame — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — mame — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 September 2022 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7913-1 Related CVEs: CVE-2022-34300 CVE-2018-16981 CVE-2021-46143 Upstream summary: It was discovered that the stb library, included in MAME, had a heap-based buffer overflow. An attacker could possibly use this issue […]

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Ubuntu 18.04 — ruby-sidekiq — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ruby-sidekiq — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 September 2022 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7695-1 Related CVEs: CVE-2022-23837 CVE-2021-30151 Upstream summary: Anas Roubi discovered that Sidekiq did not correctly sanitize certain inputs. An attacker could possibly use this issue to execute a cross-site scripting […]

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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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Ubuntu 18.04 — audiofile — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — audiofile — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 September 2022 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6558-1 Related CVEs: CVE-2018-13440 CVE-2018-17095 CVE-2019-13147 CVE-2022-24599 Upstream summary: It was discovered that audiofile could be made to dereference invalid memory. If a user or an automated system were tricked […]

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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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