Logging Monitoring

SLES 12 — mutt — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — mutt — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 7 October 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2018:2084-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-14354 CVE-2018-14360 CVE-2018-14361 CVE-2020-14093 CVE-2020-14154 CVE-2020-14954 CVE-2018-14351 CVE-2018-14357  +12 more Upstream summary: An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They […]

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How to Set Up a Load-Balanced PostgreSQL Cluster with Patroni on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up a Load-Balanced PostgreSQL Cluster with Patroni on RHEL 8

Patroni is a Python-based high-availability solution for PostgreSQL that uses a distributed configuration store — in this tutorial, etcd — to manage leader election, automatic failover, and cluster membership. On RHEL 8, both Patroni and etcd are available through the EPEL repository, making the installation straightforward. This guide walks through installing PostgreSQL, etcd, and Patroni, […]

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Oracle Linux 8 — cups — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — cups — security and stability fixes — required update (ELSA-2020-1765)

🟢 Low   ⏱ 5–15 min  Last verified: 6 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1765 Related CVEs: CVE-2019-8696 CVE-2019-8675 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Common Problems 118064

Ubuntu 18.04 GNOME Shell freezes or crashes

🟡 Medium   ⏱ 5–30 min  Last verified: 6 October 2020 📖 ~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 & Cross-Refs References & Further […]

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Common Problems 113402

Windows Server 2012 R2 ReFS Metadata Corruption Warnings on Data Volume – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 October 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Ubuntu 20.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 6 October 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4442-2 Related CVEs: CVE-2018-1000550 CVE-2018-1000671 CVE-2020-10936 Upstream summary: USN-4442-1 fixed vulnerabilities in Sympa. This update provides the corresponding updates for Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. […]

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Ubuntu 18.04 — ldns — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ldns — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 October 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5257-1 Related CVEs: CVE-2020-19860 CVE-2020-19861 Upstream summary: It was discovered that ldns incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-19860, CVE-2020-19861) Table […]

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openSUSE Tumbleweed — ruby2.7-rubygem-rails — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — ruby2.7-rubygem-rails — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2018:4041-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-16476 CVE-2018-16477 CVE-2019-5418 CVE-2020-8264 Upstream summary: A Broken Access Control vulnerability in Active Job versions >= 4.2.0 allows an attacker to craft user input which […]

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SLES 15 — libjson-c3 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libjson-c3 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 6 October 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2022:108-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-12762 Upstream summary: json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend. Table of contents […]

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How to Install Lighttpd on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Install Lighttpd on Oracle Linux 8

Introduction This tutorial demonstrates how to Install Lighttpd on Oracle Linux 8 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 AppStream […]

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