Common Problems

openSUSE Tumbleweed — perl-XML-Twig — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — perl-XML-Twig — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:1177-1 (see also SUSE bugzilla) Related CVEs: CVE-2016-9180 Upstream summary: perl-XML-Twig: The option to `expand_external_ents`, documented as controlling external entity expansion in XML::Twig does not work. External entities are always expanded, regardless […]

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Common Problems 112992

Windows Server 2016 — RRAS NAT translation table saturation causes outbound traffic drops during peak usage — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 June 2020 Affected versions: Windows Server 2016 📖 ~2 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 112433

Windows Server 2019 — DNSSEC validation failures after trust anchor rollover on Windows Server 2019 resolvers — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 23 June 2020 Affected versions: Windows Server 2019 📖 ~2 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 — json-c — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — json-c — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.14-r1 📖 ~4 min read  •  Source: Alpine secdb entry — json-c 0.14-r1 Related CVEs: CVE-2020-12762 Upstream summary: Alpine main repository for vedge ships json-c 0.14-r1 which addresses CVE-2020-12762. Table of contents Symptom & Impact Environment […]

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FreeBSD 12 — tnef — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — tnef — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: tnef — An attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message Related CVEs: CVE-2017-6307 CVE-2017-6308 CVE-2017-6309 CVE-2017-6310 CVE-2019-18849 Upstream summary: [email protected] reports: In […]

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Debian 9 — atftp — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — atftp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 June 2020 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-11365 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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SLES 12 — google-compute-engine-init — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — google-compute-engine-init — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 23 June 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:1934-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-8903 CVE-2020-8907 CVE-2020-8933 Upstream summary: A vulnerability in Google Cloud Platform's guest-oslogin versions between 20190304 and 20200507 allows a user that is only granted the […]

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Oracle Linux 8 — ksh — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ksh — vulnerability — patch and remediation guide (ELSA-2020-0559)

🟠 High   ⏱ 15–60 min  Last verified: 23 June 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0559 Related CVEs: CVE-2019-14868 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 119017

systemctl Command Not Found or Service Unit Missing on Ubuntu 14.04

🟡 Medium   ⏱ 5–30 min  Last verified: 22 June 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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