Linux

Common Problems 118540

Ubuntu 16.04 DNS resolution intermittently fails

🟡 Medium   ⏱ 5–30 min  Last verified: 17 July 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 & Cross-Refs References & Further […]

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Common Problems 117968

Ubuntu 18.04 LTS – UFW blocks required application ports after policy tighten – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 17 July 2019 Affected versions: Ubuntu 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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openSUSE Tumbleweed — radvd — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — radvd — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2011-3602 Upstream summary: Directory traversal vulnerability in device-linux.c in the router advertisement daemon (radvd) before 1.8.2 allows local users to overwrite arbitrary files, and remote […]

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

Debian 9 — librelp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 July 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-1000140 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 15 — fuse3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — fuse3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 July 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2023:3470-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-10152 CVE-2018-15664 Upstream summary: A path traversal vulnerability has been discovered in podman before version 1.4.0 in the way it handles symlinks inside containers. An […]

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SLES 15 — libqt5-qtimageformats — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libqt5-qtimageformats — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 July 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2019:0705-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-19871 Upstream summary: An issue was discovered in Qt before 5.11.3. There is QTgaFile Uncontrolled Resource Consumption. Table of contents Symptom & Impact Environment & […]

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SLES 15 — pam_yubico — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — pam_yubico — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 17 July 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2018-9275 Upstream summary: In check_user_token in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the […]

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openSUSE Tumbleweed — python-pip — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python-pip — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-FU-2021:2130-1 (see also SUSE bugzilla) Related CVEs: CVE-2013-5123 CVE-2014-8991 CVE-2015-2296 Upstream summary: The mirroring support (-M, –use-mirrors) in Python Pip before 1.5 uses insecure DNS querying and authenticity checks which allows attackers […]

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Common Problems 115439

RHEL 7 journalctl missing expected boot logs after rotation

🟡 Medium   ⏱ 5–30 min  Last verified: 16 July 2019 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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