Common Problems

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 3 March 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6189-1 Related CVEs: CVE-2021-28235 CVE-2020-15106 CVE-2020-15112 CVE-2020-15113 CVE-2020-15114 Upstream summary: It was discovered that etcd leaked credentials when debugging was enabled. This allowed remote attackers to discover etcd authentication credentials […]

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

Oracle Linux 8 — GNOME security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-4381)

🟡 Medium   ⏱ 10–30 min  Last verified: 3 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4381 Related CVEs: CVE-2021-30682 CVE-2021-1871 CVE-2020-24870 CVE-2021-1765 CVE-2021-1789 CVE-2021-30744 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 119138

NFS Mount in fstab Delays or Breaks Boot on Ubuntu 14.04

🟡 Medium   ⏱ 5–30 min  Last verified: 3 March 2021 📖 ~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 117929

Ubuntu 18.04 LTS Time Drift Breaks Kerberos and TLS

🟠 High   ⏱ 5–30 min  Last verified: 3 March 2021 Affected versions: 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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Oracle Linux 8 — virt:ol and virt-devel:ol — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:ol and virt-devel:ol — vulnerability — patch and remediation guide (ELSA-2021-5238)

🟢 Low   ⏱ 5–15 min  Last verified: 3 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-5238 Related CVEs: CVE-2021-20257 CVE-2021-3930 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Common Problems 112968

Windows Server 2016 – Display miniport TDR resets freeze RDP sessions – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 3 March 2021 Affected versions: Windows Server 2016 📖 ~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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FreeBSD 12 — mysql80-client — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — mysql80-client — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 3 March 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: MySQL — Multiple vulnerabilities Related CVEs: CVE-2020-2752 CVE-2020-2875 CVE-2020-2922 CVE-2020-2933 CVE-2020-2934 CVE-2021-22570 CVE-2021-22926 CVE-2021-22931  +12 more Upstream summary: Oracle reports: See linked CVE's for details. Table of contents Symptom & […]

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

Oracle Linux 8 — evolution security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1752)

🟢 Low   ⏱ 5–15 min  Last verified: 2 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1752 Related CVEs: CVE-2020-16117 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 118523

Ubuntu 16.04 LTS – repository signature or GPG key errors block updates – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 2 March 2021 Affected versions: Ubuntu 16.04 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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Alpine Linux edge — brotli — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — brotli — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.0.9-r0 📖 ~4 min read  •  Source: Alpine secdb entry — brotli 1.0.9-r0 Related CVEs: CVE-2020-8927 Upstream summary: Alpine main repository for vedge ships brotli 1.0.9-r0 which addresses CVE-2020-8927. Table of contents Symptom & Impact Environment […]

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