Common Problems

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

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2020-4913)

🟠 High   ⏱ 15–60 min  Last verified: 13 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4913 Related CVEs: CVE-2020-15683 CVE-2020-15969 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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SLES 12 — jdom — vulnerability — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — jdom — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 13 March 2021 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2023:712-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-33813 Upstream summary: An XXE issue in SAXBuilder in JDOM through 2.0.6 allows attackers to cause a denial of service via a crafted HTTP request. […]

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Debian 10 — php-pear — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — php-pear — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 March 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-28948 CVE-2020-36193 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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Alpine Linux edge — claws-mail — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — claws-mail — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 3.17.7-r0 📖 ~4 min read  •  Source: Alpine secdb entry — claws-mail 3.17.7-r0 Related CVEs: CVE-2020-16094 CVE-2020-15917 Upstream summary: Alpine community repository for vedge ships claws-mail 3.17.7-r0 which addresses CVE-2020-16094. Table of contents Symptom & Impact […]

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Oracle Linux 8 — dpdk security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dpdk security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4806)

🟠 High   ⏱ 15–60 min  Last verified: 12 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4806 Related CVEs: CVE-2020-10722 CVE-2020-10723 CVE-2020-10726 CVE-2020-10725 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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Common Problems 118502

Ubuntu 16.04 Interface Fails to Come Up After /etc/network/interfaces Edit

🟡 Medium   ⏱ 5–30 min  Last verified: 12 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 115109

RHEL 8 – Postfix Mail Queue Stalls from DNS Resolver Problems

🟡 Medium   ⏱ 5–30 min  Last verified: 12 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 113002

Windows Server 2016 — BGP route flapping between edge peers and RRAS gateway impacts WAN stability — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 12 March 2021 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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Gentoo Linux — mail-filter/opendmarc — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — mail-filter/opendmarc — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202011-02 Related CVEs: CVE-2020-12460 Upstream summary: It was found that OpenDMARC did not properly handle DMARC aggregate reports. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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FreeBSD 12 — py39-fail2ban — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py39-fail2ban — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 12 March 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: fail2ban — possible RCE vulnerability in mailing action using mailutils Related CVEs: CVE-2021-32749 Upstream summary: Jakub Żoczek reports: Command mail from mailutils package used in mail actions like mail-whois can […]

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