Common Problems

Common Problems 118029

Ubuntu 18.04 LTS Kubernetes Node NotReady Due to CNI Issues

🟠 High   ⏱ 5–30 min  Last verified: 10 March 2021 Affected versions: 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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Debian 9 — prosody-modules — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — prosody-modules — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 March 2021 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-8086 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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Ubuntu 20.04 — log4net — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — log4net — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 March 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4699-1 Related CVEs: CVE-2018-1285 Upstream summary: It was discovered that Apache Log4net incorrectly handled certain configuration files. An attacker could possibly use this issue to expose sensitive information. Table of […]

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Ubuntu 18.04 — axel — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — axel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 March 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4872-1 Related CVEs: CVE-2020-13614 Upstream summary: It was discovered that Axel did not properly verify the certificates for hostnames. An attacker could use this vulnerability to impersonate another server and […]

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Common Problems 114965

AppStream Module Conflict During Package Install

🟡 Medium   ⏱ 5–30 min  Last verified: 10 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 16.04 — zziplib — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — zziplib — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 10 March 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6298-1 Related CVEs: CVE-2018-7727 CVE-2020-18442 CVE-2018-6381 CVE-2018-6484 CVE-2018-6540 CVE-2018-6541 CVE-2018-6869 CVE-2018-7725  +8 more Upstream summary: Liu Zhu discovered that ZZIPlib incorrectly handled certain inputs. If a user or an automated […]

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Alpine Linux edge — obexd-enhanced — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — obexd-enhanced — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 5.54-r0 📖 ~4 min read  •  Source: Alpine secdb entry — obexd-enhanced 5.54-r0 Related CVEs: CVE-2020-0556 Upstream summary: Alpine community repository for vedge ships obexd-enhanced 5.54-r0 which addresses CVE-2020-0556. Table of contents Symptom & Impact Environment […]

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

Oracle Linux 8 — libpq — vulnerability — patch and remediation guide (ELSA-2020-5401)

🟠 High   ⏱ 15–60 min  Last verified: 10 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5401 Related CVEs: CVE-2020-25696 CVE-2020-25694 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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Oracle Linux 8 — bind — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bind — vulnerability — patch and remediation guide (ELSA-2021-1989)

🟠 High   ⏱ 15–60 min  Last verified: 10 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1989 Related CVEs: CVE-2021-25215 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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openSUSE Tumbleweed — libblas3 — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libblas3 — 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-2022:0915-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-4048 Upstream summary: An out-of-bounds read flaw was found in the CLARRV, DLARRV, SLARRV, and ZLARRV functions in lapack through version 3.10.0, as also used […]

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