Linux

Ubuntu 20.04 — heimdal — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — heimdal — multiple vulnerabilities (10 CVEs) — patch and remediation guide

  • March 30, 2022
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 30 March 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5849-1 Related CVEs: CVE-2022-45142 CVE-2021-44758 CVE-2022-3437 CVE-2022-42898 CVE-2022-44640 CVE-2022-41916 CVE-2018-16860 CVE-2019-12098  +2 more Upstream summary: Helmut Grohne discovered that Heimdal GSSAPI incorrectly handled logical conditions that are related to memory […]

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SLES 15 — arpwatch — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — arpwatch — vulnerability — patch and remediation guide

  • March 30, 2022
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 30 March 2022 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:14759-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-25321 Upstream summary: A UNIX Symbolic Link (Symlink) Following vulnerability in arpwatch of SUSE Linux Enterprise Server 11-SP4-LTSS, SUSE Manager Server 4.0, SUSE OpenStack Cloud […]

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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-2021-2233)

  • March 30, 2022
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 30 March 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2233 Related CVEs: CVE-2021-29967 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 Configure Apache mod_proxy as a Reverse Proxy on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Apache mod_proxy as a Reverse Proxy on RHEL 8

  • March 30, 2022
  • Linux
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Apache’s mod_proxy module turns your existing Apache web server into a fully functional reverse proxy without requiring a second web server like Nginx. This is particularly useful when you already have Apache managing SSL termination, virtual hosts, or authentication, and want to forward traffic to a backend application server such as Tomcat, Node.js, or a […]

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Common Problems 120528

Debian 11 – kernel or grub updates fail because /boot is full

  • March 30, 2022
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 30 March 2022 Affected versions: Debian 11 📖 ~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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How to Set Up a Multi-Node Kubernetes Cluster on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up a Multi-Node Kubernetes Cluster on CentOS Stream 9

  • March 29, 2022
  • CentOS
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Introduction Setting up set up a multi-node kubernetes cluster on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up a Multi-Node Kubernetes Cluster on CentOS Stream 9, with all the commands you need, the SELinux […]

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

AlmaLinux 8 — ilmbase — vulnerability — patch and remediation guide

  • March 29, 2022
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:1912 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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Debian 11 — eric — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — eric — vulnerability — patch and remediation guide

  • March 29, 2022
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 29 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-3068 Upstream summary: Unspecified vulnerability in Eric Integrated Development Environment (eric3) before 3.7.2 has unknown impact and attack vectors related to a "potential security exploit." Table of contents […]

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AlmaLinux 8 — gcc-toolset-11-annobin — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — gcc-toolset-11-annobin — vulnerability — patch and remediation guide

  • March 29, 2022
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4591 Related CVEs: CVE-2021-42574 Upstream summary: Annobin provides a compiler plugin to annotate and tools to examine compiled binary files. Security Fix(es): * Developer environment: Unicode's bidirectional (BiDi) override characters can cause […]

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Debian 11 — etcd — multiple vulnerabilities (15 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — etcd — multiple vulnerabilities (15 CVEs) — patch and remediation guide

  • March 29, 2022
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 29 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-1098 CVE-2018-1099 CVE-2018-16886 CVE-2020-15106 CVE-2020-15112 CVE-2020-15113 CVE-2020-15114 CVE-2020-15115  +7 more Upstream summary: A cross-site request forgery flaw was found in etcd 3.3.1 and earlier. An attacker can set […]

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