chris

How to Configure Performance Counter Alerts on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Performance Counter Alerts on Windows Server 2012 R2

How to Configure MMC Snap-ins on Windows Server 2012 R2 Microsoft Management Console (MMC) is the host application for virtually all Windows Server 2012 R2 administrative tools. Individual management capabilities are delivered as MMC snap-ins — Active Directory Users and Computers, DNS Manager, DHCP Manager, Group Policy Management, Certificate Manager, Computer Management, and dozens of […]

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FreeBSD 12 — py38-twisted — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py38-twisted — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 2 July 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-twisted — cookie and authorization headers are leaked when following cross-origin redirects Related CVEs: CVE-2019-12387 CVE-2019-9512 CVE-2019-9514 CVE-2019-9515 CVE-2020-10108 CVE-2020-10109 Upstream summary: Twisted developers report: Cookie and Authorization headers are […]

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AlmaLinux 8 — abattis-cantarell-fonts — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — abattis-cantarell-fonts — 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-2021:1894 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 — py27-twisted — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py27-twisted — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 2 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-twisted — multiple vulnerabilities Related CVEs: CVE-2019-12387 CVE-2019-9512 CVE-2019-9514 CVE-2019-9515 CVE-2020-10108 CVE-2020-10109 Upstream summary: Twisted developers reports: All HTTP clients in twisted.web.client now raise a ValueError when called with a […]

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FreeBSD 13 — rpm — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — rpm — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 2 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: rpm4 — Multiple Vulnerabilities Related CVEs: CVE-2021-3521 CVE-2021-35938 CVE-2021-35939 Upstream summary: rpm project reports: Fix intermediate symlinks not verified (CVE-2021-35939). Fix subkey binding signatures not checked on PGP public keys […]

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Cómo configurar un firewall con UFW en Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Cómo configurar un firewall con UFW en Ubuntu 20.04

UFW, o Uncomplicated Firewall, es una interfaz de gestión de firewall simplificada que oculta la complejidad de las tecnologías de filtrado de paquetes de nivel inferior, como iptables y nftables. Si desea comenzar a proteger su red y no está seguro respecto de la…

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

AlmaLinux 8 — vdo — 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-2022:2028 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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Oracle Linux 8 — firefox — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — firefox — vulnerability — patch and remediation guide (ELSA-2021-0990)

🟠 High   ⏱ 15–60 min  Last verified: 2 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0990 Related CVEs: CVE-2021-23987 CVE-2021-23984 CVE-2021-23982 CVE-2021-23981 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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