Package Management

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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openSUSE Tumbleweed — crawl — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — crawl — vulnerability — patch and remediation guide

  • April 22, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:0549-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-11722 Upstream summary: Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in […]

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Oracle Linux 8 — .NET Core 3.1 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — .NET Core 3.1 security and bugfix update

  • April 21, 2021
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 21 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2954 Related CVEs: CVE-2020-1147 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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IBM AIX 7.1 — CVE-2021-29832 — xss — patch and remediation guide — diagnosis and fix on IBM AIX 7.1

IBM AIX 7.1 — CVE-2021-29832 — xss — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 21 April 2021 Affected versions: IBM AIX 7.1 📖 ~4 min read  •  Source: NVD CVE-2021-29832, IBM Support Bulletin CVE: CVE-2021-29832 NVD summary: IBM Jazz for Service Management 1.1.3.10 and IBM Tivoli Netcool/OMNIbus_GUI is vulnerable to stored cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript […]

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How to Configure Oracle Linux 8 for Container Workloads — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Oracle Linux 8 for Container Workloads

Introduction This tutorial demonstrates how to Configure Oracle Linux 8 for Container Workloads on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with the default […]

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FreeBSD 13 — rubygem-rexml — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — rubygem-rexml — vulnerability — patch and remediation guide

  • April 21, 2021
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 21 April 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ruby — XML round-trip vulnerability in REXML Related CVEs: CVE-2021-28965 Upstream summary: Juho Nurminen reports: When parsing and serializing a crafted XML document, REXML gem (including the one bundled with […]

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FreeBSD 13 — tmux — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 13

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

  • April 21, 2021
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 21 April 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: tmux — stack overflow in CSI parsing Upstream summary: Nicholas Marriott reports: tmux has a stack overflow in CSI parsing. Table of contents Symptom & Impact Environment & Reproduction Root […]

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