Ubuntu 18.04

Ubuntu 18.04 — libsndfile — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libsndfile — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 January 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7273-1 Related CVEs: CVE-2021-4156 CVE-2024-50612 CVE-2022-33065 CVE-2021-3246 CVE-2017-14245 CVE-2017-14246 CVE-2017-14634 CVE-2017-16942  +9 more Upstream summary: It was discovered that libsndfile incorrectly handled memory when executing its FLAC codec. If a […]

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Ubuntu 18.04 — protobuf — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — protobuf — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 January 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7629-2 Related CVEs: CVE-2025-4565 CVE-2024-7254 CVE-2021-22569 CVE-2021-22570 CVE-2022-1941 Upstream summary: USN-7435-1 and USN-7629-1 fixed vulnerabilities in Protocol Buffers for several releases of Ubuntu. This update provides the corresponding fixes for […]

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Ubuntu 18.04 — poppler — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — poppler — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 January 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7708-1 Related CVEs: CVE-2025-50420 CVE-2025-52886 CVE-2022-27337 CVE-2025-43903 CVE-2025-32364 CVE-2025-32365 CVE-2024-56378 https://launchpad.net/bugs/2045027  +12 more Upstream summary: It was discovered that poppler incorrectly handled certain PDF files. An attacker could possibly use […]

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Common Problems 117952

Add-apt-repository Command Not Found

🟡 Medium   ⏱ 5–30 min  Last verified: 2 January 2025 📖 ~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 — editorconfig-core — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — editorconfig-core — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2024 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7168-1 Related CVEs: CVE-2023-0341 CVE-2024-53849 Upstream summary: It was discovered that EditorConfig improperly managed memory when handling certain inputs, leading to overflows. An attacker could possibly use these issues to […]

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Common Problems 118104

Ubuntu 18.04 SSH connection refused after reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 28 December 2024 📖 ~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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Common Problems 117941

Ubuntu 18.04 NVIDIA Driver Install Leaves GUI Unusable

🟡 Medium   ⏱ 5–30 min  Last verified: 24 December 2024 📖 ~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 — python-werkzeug — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — python-werkzeug — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 24 December 2024 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6799-1 Related CVEs: CVE-2024-34069 CVE-2023-23934 CVE-2023-25577 CVE-2019-14806 CVE-2020-28724 Upstream summary: It was discovered that the debugger in Werkzeug was not restricted to trusted hosts. A remote attacker could possibly use […]

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 19 December 2024 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6852-2 Related CVEs: CVE-2024-38428 CVE-2018-20483 CVE-2019-5953 CVE-2018-0494 Upstream summary: USN-6852-1 fixed a vulnerability in Wget. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original […]

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