Common Problems

Debian 10 — network-manager-ssh — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — network-manager-ssh — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 November 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-9355 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Alpine Linux edge — hylafaxplus — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — hylafaxplus — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 7.0.2-r2 📖 ~4 min read  •  Source: Alpine secdb entry — hylafaxplus 7.0.2-r2 Related CVEs: CVE-2020-15396 CVE-2020-15397 Upstream summary: Alpine community repository for vedge ships hylafaxplus 7.0.2-r2 which addresses CVE-2020-15396. Table of contents Symptom & Impact […]

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Ubuntu 18.04 — ruby-gon — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ruby-gon — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4560-1 Related CVEs: CVE-2020-25739 Upstream summary: It was discovered that Gon gem did not properly escape certain input. An attacker could use this vulnerability to execute a cross-site scripting (XSS) […]

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Oracle Linux 8 — squid:4 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — squid:4 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4743)

🟡 Medium   ⏱ 10–30 min  Last verified: 21 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4743 Related CVEs: CVE-2019-18676 CVE-2019-18679 CVE-2019-12526 CVE-2019-12854 CVE-2019-12523 CVE-2019-18677 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 119029

Ubuntu 14.04 LTS – apt update returns 404 from archive mirrors

🟠 High   ⏱ 5–30 min  Last verified: 21 November 2020 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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 118978

Ubuntu 14.04 LTS SSH Public Key Login Suddenly Fails

🟡 Medium   ⏱ 5–30 min  Last verified: 21 November 2020 📖 ~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 117631

Ubuntu 20.04 LTS Recurring ext4 Journal Errors on Reboot

🟠 High   ⏱ 5–30 min  Last verified: 21 November 2020 Affected versions: 20.04 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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Oracle Linux 8 — systemd security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — systemd security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2019-3592)

🟡 Medium   ⏱ 10–30 min  Last verified: 20 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3592 Related CVEs: CVE-2019-15718 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 118917

Ubuntu 14.04 LTS – apt lock prevents updates during maintenance windows – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 20 November 2020 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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