Common Problems

Common Problems 118447

Ubuntu 16.04 LTS drops to GRUB rescue prompt

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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 118131

Ubuntu 18.04 LTS initramfs drop to BusyBox after UUID change

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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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openSUSE Tumbleweed — python36-rtslib-fb — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-rtslib-fb — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:1156-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14019 Upstream summary: Open-iSCSI rtslib-fb through 2.1.72 has weak permissions for /etc/target/saveconfig.json because shutil.copyfile (instead of shutil.copy) is used, and thus permissions are not preserved. […]

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Common Problems 115577

systemctl Restart Hangs Because Dependency Is Deadlocked

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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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Ubuntu 20.04 — ipmitool — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — ipmitool — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 March 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5997-1 Related CVEs: CVE-2020-5208 Upstream summary: It was discovered that IPMItool was not properly checking the data received from a remote LAN party. A remote attacker could possibly use this […]

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Common Problems 115527

firewalld Zone Misassignment Breaks App Reachability

🟡 Medium   ⏱ 5–30 min  Last verified: 5 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 113583

Windows Server 2012 R2 — SMB access fails because NetBIOS name resolution is broken — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 5 March 2021 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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SLES 15 — ruby2.5-rubygem-kramdown — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — ruby2.5-rubygem-kramdown — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 March 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3259-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14001 Upstream summary: The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such […]

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SLES 15 — python3-Flask-Security-Too — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — python3-Flask-Security-Too — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 March 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3093-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-21241 CVE-2021-23385 Upstream summary: The Python "Flask-Security-Too" package is used for adding security features to your Flask application. It is an is a independently maintained […]

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