Ubuntu 18.04

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

Ubuntu 18.04 — json-c — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 September 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4360-4 Related CVEs: CVE-2020-12762 https://launchpad.net/bugs/1878723 Upstream summary: USN-4360-1 fixed a vulnerability in json-c. The security fix introduced a memory leak that was reverted in USN-4360-2 and USN-4360-3. This update provides […]

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How To Acquire a Let's Encrypt Certificate Using DNS Validation with acme-dns-certbot on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Acquire a Let’s Encrypt Certificate Using DNS Validation with acme-dns-certbot on Ubuntu 18.04

DNS validation allows for certificate issuance requests to be verified using DNS records, rather than by serving content over HTTP. The acme-dns-certbot tool is used to connect Certbot to a third-party DNS server where the certificate validation records can be set automatically via an API when you request a certificate. The advantage of this is that you don’t need to integrate Certbot directly with your DNS provider , nor do you need to grant it unrestricted access to your full DNS configuration

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Common Problems 118133

Ubuntu 18.04 LTS – DKMS module build fails after kernel update and drivers stop loading – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 20 September 2020 Affected versions: Ubuntu 18.04 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 118038

Ubuntu 18.04 LTS – kernel update leaves system stuck on old version – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 20 September 2020 Affected versions: Ubuntu 18.04 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 18.04 — postsrsd — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — postsrsd — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 September 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4730-1 Related CVEs: CVE-2020-35573 Upstream summary: It was discovered that PostSRSd mishandled certain input. A remote attacker could use this vulnerability to cause a denial of service via a long […]

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