Operations

AlmaLinux 8 — arpwatch — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — arpwatch — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2020:1891 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Ubuntu 20.04 — librecad — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — librecad — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 9 January 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5957-1 Related CVEs: CVE-2018-19105 CVE-2021-21898 CVE-2021-21899 CVE-2021-21900 CVE-2021-45341 CVE-2021-45342 CVE-2021-45343 Upstream summary: Cody Sixteen discovered that LibreCAD incorrectly handled memory when parsing DXF files. An attacker could use this issue […]

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Oracle Linux 8 — dotnet5.0 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet5.0 security and bugfix update (ELSA-2021-2036)

🟠 High   ⏱ 15–60 min  Last verified: 8 January 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2036 Related CVEs: CVE-2021-31204 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 118992

Ubuntu 14.04 LTS swap thrashing causes severe performance degradation

🟠 High   ⏱ 5–30 min  Last verified: 8 January 2022 Affected versions: 14.04 📖 ~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 […]

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IBM AIX 7.3 — CVE-1999-0513 — denial of service — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-1999-0513 — denial of service — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 8 January 2022 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-1999-0513, IBM PSIRT advisory page CVE: CVE-1999-0513 NVD summary: ICMP messages to broadcast addresses are allowed, allowing for a Smurf attack that can cause a denial of service. References: exchange.xforce.ibmcloud.com/vulnerabilities/CVE   exchange.xforce.ibmcloud.com/vulnerabilities/CVE […]

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How to Configure Multipath I/O on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Multipath I/O on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure multipath i/o on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Multipath I/O on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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FreeBSD 13 — p5-DBI — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — p5-DBI — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 January 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: p5-DBI — insecure temporary file creation vulnerability Related CVEs: CAN-2005-0077 Upstream summary: Javier Fernández-Sanguino Peña reports: The DBI library, the Perl5 database interface, creates a temporary PID file in an […]

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Common Problems 118116

Ubuntu 18.04 LTS – PHP-FPM pool crashes under load with memory limit issues – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 January 2022 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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FreeBSD 13 — taglib — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — taglib — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 January 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: taglib — heap-based buffer over-read via a crafted audio file Related CVEs: CVE-2018-11439 Upstream summary: Webin security lab – dbapp security Ltd reports: The TagLib::Ogg::FLAC::File::scan function in oggflacfile.cpp in TagLib […]

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FreeBSD 13 — bsh — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — bsh — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 January 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: bsh — remote code execution vulnerability Related CVEs: CVE-2016-2510 Upstream summary: Stian Soiland-Reyes reports: This release fixes a remote code execution vulnerability that was identified in BeanShell by Alvaro Muñoz […]

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