March 2021 - Page 20 of 63

FreeBSD 12 — py38-flask-security — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py38-flask-security — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 March 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-flask-security — user redirect to arbitrary URL vulnerability Related CVEs: CVE-2021-23385 Upstream summary: Snyk reports: This affects all versions of package Flask-Security. When using the `get_post_logout_redirect` and `get_post_login_redirect` functions, it […]

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How To Install Salt on Ubuntu 12.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Salt on Ubuntu 12.04

In this tutorial, you will install a Salt Master and a Salt Minion on a cloud servers running Ubuntu 12.04. You will also begin to explore how Salt works by executing a few simple commands.

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Ubuntu 20.04 — gthumb — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — gthumb — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 March 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5680-1 Related CVEs: CVE-2019-20326 CVE-2020-36427 Upstream summary: It was discovered that gThumb did not properly managed memory when processing certain image files. If a user were tricked into opening a […]

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How to Configure DHCP Failover on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure DHCP Failover on Windows Server 2016

How to Configure High Availability for DHCP with DHCP Failover on Windows Server 2016 DHCP (Dynamic Host Configuration Protocol) is a critical network service — when it fails, new devices cannot obtain IP addresses and existing leases eventually expire, causing network outages. Windows Server 2016 includes DHCP Failover, a feature that allows two DHCP servers […]

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Ubuntu 16.04 — pulseaudio — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — pulseaudio — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 March 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4640-1 Related CVEs: CVE-2020-16123 CVE-2020-15710 CVE-2020-11931 https://launchpad.net/bugs/1877102 Upstream summary: James Henstridge discovered that an Ubuntu-specific patch caused PulseAudio to incorrectly handle snap client connections. An attacker could possibly use this […]

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Como instalar o MySQL no Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Como instalar o MySQL no Ubuntu 20.04

Uma versão anterior deste tutorial foi escrita por Hazel Virdó O MySQL é um sistema de gerenciamento de banco de dados de código aberto, que é geralmente instalado como parte da pilha popular…

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Ubuntu 14.04 — fail2ban — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — fail2ban — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 March 2021 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5232-1 Related CVEs: CVE-2021-32749 Upstream summary: Jakub Żoczek discovered that certain Fail2ban actions handled whois responses in an insecure way. If Fail2ban was configured to use certain mail actions like […]

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openSUSE Tumbleweed — libfreeimage3 — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libfreeimage3 — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-21428 CVE-2019-12211 CVE-2015-0852 CVE-2016-5684 CVE-2019-12213 Upstream summary: Buffer Overflow vulnerability in function LoadRGB in PluginDDS.cpp in FreeImage 3.18.0 allows remote attackers to run arbitrary code […]

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How To Handle CPU-Bound Tasks with Web Workers — step-by-step Javascript tutorial on Progressive Robot

How To Handle CPU-Bound Tasks with Web Workers

In this tutorial, you will create a CPU-bound task that blocks the main thread in the browser and observe how it affects the web app. You will then unsuccessfully attempt to make a CPU-bound task non-blocking using promises. Finally, you will create a Web Worker to offload a CPU-bound task to another thread to prevent it from blocking the main thread.

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