Operations

How to Configure Live Migration in Hyper-V on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Live Migration in Hyper-V on Windows Server 2016

How to Configure Windows Server 2016 Live Migration Live Migration allows you to move running virtual machines from one Hyper-V host to another with zero downtime, making it essential for hardware maintenance, load balancing, and disaster recovery scenarios. Windows Server 2016 introduces several improvements to Live Migration, including compressed and SMB transport modes and virtual […]

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FreeBSD 13 — py310-markdown — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py310-markdown — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-markdown2 — regular expression denial of service vulnerability Related CVEs: CVE-2020-11888 CVE-2021-26813 Upstream summary: Ben Caller reports: markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of […]

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AlmaLinux 8 — network-manager-applet — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — network-manager-applet — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2022:1758 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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FreeBSD 13 — rinetd — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — rinetd — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: fd_set — bitmap index overflow in multiple applications Upstream summary: 3APA3A reports: If programmer fails to check socket number before using select() or fd_set macros, it's possible to overwrite memory […]

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Ubuntu 18.04 — libapache2-mod-auth-mellon — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libapache2-mod-auth-mellon — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 August 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5069-1 Related CVEs: CVE-2021-3639 CVE-2019-13038 CVE-2019-3877 CVE-2019-3878 Upstream summary: It was discovered that mod-auth-mellon incorrectly filtered certain URLs. A remote attacker could possibly use this issue to perform an open […]

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Oracle Linux 8 — lasso security and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — lasso security and — enhancement update — new behaviour and fixes (ELSA-2021-4325)

🟡 Medium   ⏱ 10–30 min  Last verified: 14 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4325 Related CVEs: CVE-2021-28091 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 118950

Ubuntu 14.04 LTS Network Interface Fails After ifupdown Edit

🟠 High   ⏱ 5–30 min  Last verified: 14 August 2021 Affected versions: 14.04 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 — py27-imaging — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py27-imaging — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-imaging, py-pillow — Buffer overflow in PCD decoder Related CVEs: CVE-2016-0775 Upstream summary: The Pillow maintainers report: In all versions of Pillow, dating back at least to the last PIL […]

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Common Problems 118559

Ubuntu 16.04 LTS Expired GPG Keys Break apt Repositories

🟡 Medium   ⏱ 5–30 min  Last verified: 14 August 2021 Affected versions: 16.04 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 — qt4-imageformats — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — qt4-imageformats — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 14 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: qt4-imageformats, qt4-gui, qt5-gui — Multiple Vulnerabilities in Qt Image Format Handling Related CVEs: CVE-2014-0190 CVE-2015-1858 CVE-2015-1859 CVE-2015-1860 Upstream summary: Richard J. Moore reports: Due to two recent vulnerabilities identified in […]

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