Linux

AlmaLinux 8 — jackson-module-jaxb-annotations — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — jackson-module-jaxb-annotations — multiple vulnerabilities (17 CVEs) — patch and remediation guide

  • April 22, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2019:2720 Related CVEs: CVE-2019-12384 CVE-2018-11784 CVE-2018-8014 CVE-2018-8034 CVE-2018-8037 CVE-2019-14540 CVE-2019-16335 CVE-2019-16942  +9 more Upstream summary: The Public Key Infrastructure (PKI) Deps module contains fundamental packages required as dependencies for the pki-core module […]

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TLS vs SSL: Understanding Key Differences and Why It Matters — step-by-step Linux tutorial on Progressive Robot

TLS vs SSL: Understanding Key Differences and Why It Matters

  • April 22, 2021
  • Linux
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Learn the key differences between TLS and SSL protocols, why TLS has replaced SSL for modern web security, and how these encryption standards impact your website’s security and performance. Understand their evolution, security implications, and best practices for implementation.

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Debian 10 — python-flask-cors — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — python-flask-cors — vulnerability — patch and remediation guide

  • April 22, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 22 April 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-25032 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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Gentoo Linux — www-apps/nextcloud — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — www-apps/nextcloud — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • April 22, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202208-17 Related CVEs: CVE-2021-32653 CVE-2021-32654 CVE-2021-32655 CVE-2021-32656 CVE-2021-32657 CVE-2021-32678 CVE-2021-32679 CVE-2021-32680  +12 more Upstream summary: Multiple vulnerabilities have been discovered in Nextcloud. Please review the CVE identifiers referenced below for details. Table […]

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Ubuntu 20.04 — hplip — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — hplip — vulnerability — patch and remediation guide

  • April 22, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 22 April 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7202-1 Related CVEs: CVE-2020-6923 Upstream summary: Kevin Backhouse discovered that HPLIP incorrectly handled certain MDNS responses. A remote attacker could use this issue to cause HPLIP to crash, resulting in […]

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Ubuntu 20.04 — linux-oem-5.6 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-oem-5.6 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • April 22, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 22 April 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4947-1 Related CVEs: CVE-2020-35519 CVE-2021-28375 CVE-2021-29646 CVE-2021-29650 CVE-2021-30002 https://launchpad.net/bugs/1924611 CVE-2021-3492 CVE-2021-3493  +12 more Upstream summary: Kiyin (尹亮) discovered that the x25 implementation in the Linux kernel contained overflows when handling […]

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Gentoo Linux — dev-java/ant — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-java/ant — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • April 22, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202011-18 Related CVEs: CVE-2020-11979 CVE-2020-1945 Upstream summary: A previous fix for a security vulnerability involving insecure temporary files has been found to be incomplete. Table of contents Symptom & Impact Environment & […]

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

Oracle Linux 8 — brotli — vulnerability — patch and remediation guide (ELSA-2021-1702)

  • April 22, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 22 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1702 Related CVEs: CVE-2020-8927 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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How to Install PHP on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install PHP on RHEL 8

  • April 22, 2021
  • Linux
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PHP is the most widely used server-side scripting language on the web, powering platforms like WordPress, Drupal, and countless custom applications. Red Hat Enterprise Linux 8 delivers PHP through its AppStream module system, which lets you install and switch between multiple PHP versions without conflicting packages. This tutorial walks through installing PHP on RHEL 8 […]

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