Fix Prevention

How to Set Up Automatic SSH Login Banners on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up Automatic SSH Login Banners on RHEL 7

How to Set Up Automatic SSH Login Banners on RHEL 7 Displaying a clear, legally appropriate banner when users connect to a Linux server over SSH is both a security best practice and a compliance requirement in many regulated environments such as PCI-DSS, HIPAA, and government frameworks. On Red Hat Enterprise Linux 7, there are […]

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FreeBSD 12 — nap — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — nap — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 August 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: nap allows arbitrary file access Upstream summary: According to the author: Fixed security loophole which allowed remote clients to access arbitrary files on our system. Table of contents Symptom & […]

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FreeBSD 12 — newspost — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — newspost — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 August 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: newspost — server response buffer overflow vulnerability Related CVEs: CVE-2005-0101 Upstream summary: The newspost program uses a function named socket_getline to read server responses from the network socket. Unfortunately this […]

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How to Detect Rootkits with rkhunter and chkrootkit on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Detect Rootkits with rkhunter and chkrootkit on RHEL 7

How to Detect Rootkits with rkhunter and chkrootkit on RHEL 7 A rootkit is a collection of malicious software designed to maintain persistent, hidden access to a compromised system while concealing its presence from the administrator and standard system tools. Once installed, rootkits can replace core binaries, hide processes and network connections, and exfiltrate data […]

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

FreeBSD 12 — gstreamer-ffmpeg — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 1 August 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ffmpeg — multiple vulnerabilities Related CVEs: CVE-2011-3892 CVE-2011-3893 CVE-2011-3895 CVE-2011-3929 CVE-2011-3936 CVE-2011-3937 CVE-2011-3940 CVE-2011-3945  +12 more Upstream summary: NVD reports: The ff_dwt_decode function in libavcodec/jpeg2000dwt.c in FFmpeg before 2.8.4 does […]

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

Debian 10 — patch — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 August 2019 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-20969 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 Use Percona XtraBackup for MySQL Hot Backups on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Use Percona XtraBackup for MySQL Hot Backups on RHEL 8

Percona XtraBackup is an open-source hot backup utility for MySQL and Percona Server that performs physical backups without locking tables or interrupting active queries on InnoDB tables. Unlike mysqldump, which produces logical SQL dumps, XtraBackup copies InnoDB data files directly and replays the transaction log to bring the backup to a consistent state, making it […]

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Common Problems 118604

setlocale Warnings and UTF-8 Locale Misconfiguration

🟡 Medium   ⏱ 5–30 min  Last verified: 31 July 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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Common Problems 112425

Windows Server 2019 — MSI install rolls back at completion stage due to custom action failure — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 31 July 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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How to Set Up Active Directory Tiered Administration on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up Active Directory Tiered Administration on Windows Server 2012 R2

How to Set Up Active Directory Tiered Administration on Windows Server 2012 R2 The Microsoft Active Directory Tiered Administration model is a security architecture that separates administrative accounts and systems into three tiers to prevent credential theft attacks from escalating across the entire environment. Tier 0 contains the most critical assets — Domain Controllers, PKI […]

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