Ubuntu 22.04

Common Problems 116938

Ubuntu 22.04 LTS – apt update fails with failed to fetch mirror errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 December 2022 Affected versions: Ubuntu 22.04 LTS (Jammy) 📖 ~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 […]

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How To Use Vuls as a Vulnerability Scanner on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How To Use Vuls as a Vulnerability Scanner on Ubuntu 22.04

Vuls is an open-source, agentless vulnerability scanner that automates security vulnerability analysis of the software installed on a system. In this tutorial, you’ll deploy Vuls to an Ubuntu 22.04 server, building Vuls and its dependencies from source code, configuring scanning and reporting to Slack, and optionally connecting it to additional target machines to enable remote scanning.

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Ubuntu 22.04 — ecdsautils — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — ecdsautils — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 December 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6239-1 Related CVEs: CVE-2022-24884 Upstream summary: It was discovered that ECDSA Util did not properly verify certain signature values. An attacker could possibly use this issue to bypass signature verification. […]

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Common Problems 116915

Ubuntu 22.04 LTS – DNS resolution fails with systemd-resolved – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 7 December 2022 Affected versions: Ubuntu 22.04 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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Common Problems 117111

Ubuntu 22.04 LTS – Kernel module fails to load after HWE update – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 December 2022 Affected versions: Ubuntu 22.04 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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Common Problems 117113

Ubuntu 22.04 LTS – apt update fails with NO_PUBKEY repository signature errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 4 December 2022 Affected versions: Ubuntu 22.04 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 — fis-gtm — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — fis-gtm — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 4 December 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7422-1 Related CVEs: CVE-2021-44492 CVE-2021-44498 CVE-2021-44500 CVE-2021-44502 CVE-2021-44506 CVE-2021-44508 CVE-2021-44509 CVE-2021-44510 Upstream summary: It was discovered that FIS-GT.M could incorrectly dereference memory in certain instances. An attacker could possibly use […]

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Common Problems 117011

Ubuntu 22.04 LTS – GRUB update fails after disk UUID change – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 December 2022 Affected versions: Ubuntu 22.04 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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