Ubuntu 18.04

Common Problems 117977

Ubuntu 18.04 UFW Rules Not Applied After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 7 February 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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Ubuntu 18.04 — nfs-utils — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — nfs-utils — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 February 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4400-1 Related CVEs: CVE-2019-3689 Upstream summary: It was discovered that the nfs-utils package set incorrect permissions on the /var/lib/nfs directory. An attacker could possibly use this issue to escalate privileges. […]

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

Ubuntu 18.04 — file-roller — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 6 February 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4927-1 Related CVEs: CVE-2020-36314 CVE-2020-11736 CVE-2019-16680 Upstream summary: It was discovered that File Roller incorrectly handled symlinks. An attacker could possibly use this issue to expose sensitive information. Table of […]

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Common Problems 118114

Ubuntu 18.04 intermittent DNS resolution failures

🟡 Medium   ⏱ 5–30 min  Last verified: 5 February 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 118054

Ubuntu 18.04 Snap applications fail to launch

🟡 Medium   ⏱ 5–30 min  Last verified: 4 February 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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Comment configurer les hôtes virtuels Apache sur Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

Comment configurer les hôtes virtuels Apache sur Ubuntu 18.04

Le serveur web Apache est une méthode populaire pour desservir les sites web sur Internet. En 2019, on estime qu’il desservira 29 % de tous les sites web actifs et il offre robustesse et flexibilité aux développeurs. Grâce à Apache, un administrateur peut configurer un serveur…

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Ubuntu 18.04 — tmpreaper — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — tmpreaper — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 February 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4077-1 Related CVEs: CVE-2019-3461 Upstream summary: It was discovered that tmpreaper incorrectly handled certain mount operations. A local attacker could possibly use this issue to create arbitrary files, leading to […]

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How To Enable SFTP Without Shell Access on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Enable SFTP Without Shell Access on Ubuntu 18.04

In a standard configuration, the SSH server grants file transfer access and terminal shell access to all users with an account on the system. In this tutorial, we’ll set up the SSH daemon to limit SFTP access to one directory with no SSH access allowed on per user basis on an Ubuntu 18.04 server.

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Common Problems 118108

Ubuntu 18.04 Failed Automatic Security Upgrades from GPG Key Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 29 January 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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