2019 - Page 237 of 527

Common Problems 115632

RHEL 7 firewalld Direct Rules Lost After Reload

🟡 Medium   ⏱ 5–30 min  Last verified: 4 September 2019 Affected versions: RHEL 7 📖 ~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 Configure Prometheus Alerting Rules on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Configure Prometheus Alerting Rules on SLES 12

Introduction This tutorial covers How to Configure Prometheus Alerting Rules on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Install Prometheus zypper install -y golang-github-prometheus-prometheus Step 2 […]

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openSUSE Tumbleweed — libHX28 — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libHX28 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SR:2010:019 (see also SUSE bugzilla) Related CVEs: CVE-2010-2947 Upstream summary: Heap-based buffer overflow in the HX_split function in string.c in libHX before 3.6 allows remote attackers to execute arbitrary code or cause […]

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FreeBSD 12 — py39-psutil — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py39-psutil — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-psutil — double free vulnerability Related CVEs: CVE-2019-18874 Upstream summary: ret2libc reports: psutil (aka python-psutil) through 5.6.5 can have a double free. This occurs because of refcount mishandling within a […]

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Common Problems 115081

RHEL 8 Cockpit Web Console Unreachable After Firewall Policy Change

🟡 Medium   ⏱ 5–30 min  Last verified: 4 September 2019 📖 ~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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Debian 9 — libpng1.6 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — libpng1.6 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 September 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-7317 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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Ubuntu 16.04 — sigil — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — sigil — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 September 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4085-1 Related CVEs: CVE-2019-14452 Upstream summary: Mike Salvatore discovered that Sigil mishandled certain malformed EPUB files. An attacker could use this vulnerability to write arbitrary files to the filesystem. Table […]

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Arch Linux — python-mysql-connector — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — python-mysql-connector — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201902-21 Related CVEs: CVE-2019-2435 Upstream summary: Type: authentication bypass. Status: Fixed. Affected: 8.0.13-1. Fixed in: 8.0.15-1. Group: AVG-898. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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How to Set Up Snort Network Intrusion Detection on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Snort Network Intrusion Detection on Debian 9

Introduction How to Set Up Snort Network Intrusion Detection on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from […]

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Comment lire et configurer les variables d'environnement et de shell sous Linux — step-by-step Linux tutorial on Progressive Robot

Comment lire et configurer les variables d’environnement et de shell sous Linux

Dans les systèmes Linux, les variables d’environnement et de shell servent à configurer les conditions d’utilisation du shell. Vous pouvez les transmettre aux processus enfant et les utiliser pour configurer des options. Vous pouvez également mettre certaines informations à la disposition des processus qui se déclenchent pendant la session. Tout au long de ce guide, nous allons parler de la manière de lire, modifier, créer et détruire des variables d’environnement et de shell.

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