Common Problems

Oracle Linux 8 — nodejs:10 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nodejs:10 — vulnerability — patch and remediation guide (ELSA-2020-0579)

🟠 High   ⏱ 15–60 min  Last verified: 30 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0579 Related CVEs: CVE-2019-15604 CVE-2019-15605 CVE-2019-15606 CVE-2019-16776 CVE-2019-16775 CVE-2019-16777 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Oracle Linux 8 — systemd — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — systemd — security and stability fixes — required update (ELSA-2019-0990)

🟡 Medium   ⏱ 10–30 min  Last verified: 29 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-0990 Related CVEs: CVE-2019-6454 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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Debian 10 — json-c — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — json-c — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 December 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-12762 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 118588

Cron jobs not running under expected user context

🟡 Medium   ⏱ 5–30 min  Last verified: 29 December 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 112595

Windows Server 2019 — Delivery Optimization peer cache disabled causing WAN saturation during patch — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 29 December 2020 Affected versions: Windows Server 2019 📖 ~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 14.04 — libpodofo — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — libpodofo — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 29 December 2020 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7217-1 Related CVEs: CVE-2017-5886 CVE-2018-11255 CVE-2018-12983 CVE-2018-20797 CVE-2018-5308 CVE-2018-8002 CVE-2019-10723 CVE-2020-18971  +2 more Upstream summary: It was discovered that the PoDoFo library could dereference a NULL pointer when getting the […]

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

Oracle Linux 8 — libreoffice security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4628)

🟢 Low   ⏱ 5–15 min  Last verified: 28 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4628 Related CVEs: CVE-2020-12802 CVE-2020-12803 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 118497

Ubuntu 16.04 LTS sudo: unable to resolve host

🟡 Medium   ⏱ 5–30 min  Last verified: 28 December 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 115555

RHEL 7 firewalld Rich Rule Accidentally Blocks App Traffic

🟠 High   ⏱ 5–30 min  Last verified: 28 December 2020 Affected versions: RHEL 7 📖 ~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 115397

yum Fails Due to Another App Holding the RPM Lock

🟡 Medium   ⏱ 5–30 min  Last verified: 28 December 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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