Security Hardening

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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SLES 15 — pam_krb5 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — pam_krb5 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 4 September 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SR:2008:027 (see also SUSE bugzilla) Related CVEs: CVE-2008-3825 CVE-2009-1384 Upstream summary: pam_krb5 2.2.14 in Red Hat Enterprise Linux (RHEL) 5 and earlier, when the existing_ticket option is enabled, uses incorrect privileges when […]

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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-2019-1269)

🔴 Critical   ⏱ 15–90 min  Last verified: 4 September 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-1269 Related CVEs: CVE-2019-5798 CVE-2019-11691 CVE-2019-11693 CVE-2019-9819 CVE-2019-7317 CVE-2019-9797 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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FreeBSD 12 — openjdk — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — openjdk — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: java — multiple vulnerabilities Related CVEs: CVE-2012-4681 CVE-2013-0433 CVE-2015-4734 CVE-2015-4803 CVE-2015-4805 CVE-2015-4806 CVE-2015-4810 CVE-2015-4835  +12 more Upstream summary: Oracle reports: This Critical Patch Update contains 25 new security fixes for […]

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Arch Linux — live-media — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — live-media — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201905-17 Related CVEs: CVE-2019-7733 CVE-2019-7314 Upstream summary: Type: multiple issues. Status: Fixed. Affected: 2018.10.17-1. Fixed in: 2019.05.12-1. Group: AVG-870. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Debian 10 — opendmarc — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — opendmarc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 September 2019 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-16378 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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Common Problems 118956

Ubuntu 14.04 LTS – system boots into grub rescue prompt after update – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 September 2019 Affected versions: Ubuntu 14.04 LTS 📖 ~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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Common Problems 115020

Kernel panic after package update and reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 3 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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FreeBSD 12 — polarssl — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — polarssl — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 3 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mbed TLS (PolarSSL) — multiple vulnerabilities Related CVEs: CVE-2013-4623 CVE-2013-5915 CVE-2015-1182 CVE-2015-5291 CVE-2018-0487 CVE-2018-0488 Upstream summary: Simon Butcher reports: Defend against Bellcore glitch attacks by verifying the results of RSA […]

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Common Problems 112549

Windows Server 2019 — DFS Namespace referral delays during site failover — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 3 September 2019 Affected versions: Windows Server 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 […]

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