Common Problems

Common Problems 117914

Ubuntu 18.04 no sound output on speakers or headset

🟡 Medium   ⏱ 5–30 min  Last verified: 12 September 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 113486

Windows Server 2012 R2 – Filesystem minifilter altitude conflict causes access denied spikes – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 12 September 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 112478

Windows Server 2019 — SoftwareDistribution Corruption Causes Endless Update Retry Loop — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 12 September 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 16.04 — sane-backends — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — sane-backends — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 12 September 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4470-1 Related CVEs: CVE-2017-6318 CVE-2020-12861 CVE-2020-12862 CVE-2020-12863 CVE-2020-12864 CVE-2020-12865 CVE-2020-12866 CVE-2020-12867 Upstream summary: Kritphong Mongkhonvanit discovered that sane-backends incorrectly handled certain packets. A remote attacker could possibly use this issue […]

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Common Problems 121184

Debian 10: Nginx serves incomplete TLS certificate chain

🟠 High   ⏱ 5–30 min  Last verified: 11 September 2020 Affected versions: Debian 10 📖 ~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 118400

Ubuntu 16.04 apt lock errors during updates

🟡 Medium   ⏱ 5–30 min  Last verified: 11 September 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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SLES 12 — libproxy1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libproxy1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 11 September 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2020:518-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-25219 CVE-2020-26154 CVE-2012-4504 Upstream summary: url::recvline in url.cpp in libproxy 0.4.x through 0.4.15 allows a remote HTTP server to trigger uncontrolled recursion via a response […]

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Common Problems 117444

Ubuntu 20.04 LTS NO_PUBKEY Repository Signature Error

🟡 Medium   ⏱ 5–30 min  Last verified: 11 September 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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Oracle Linux 8 — redis:5 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — redis:5 — vulnerability — patch and remediation guide (ELSA-2019-2002)

🟠 High   ⏱ 15–60 min  Last verified: 11 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-2002 Related CVEs: CVE-2019-10193 CVE-2019-10192 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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Debian 10 — bluez — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — bluez — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 September 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-0556 CVE-2020-26558 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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