chris

Common Problems 115457

sshd Starts but Remote Access Still Fails

🟡 Medium   ⏱ 5–30 min  Last verified: 1 August 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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What is MongoDB? — step-by-step Databases tutorial on Progressive Robot

What is MongoDB?

MongoDB, also known as Mongo, is an open-source document database used in many modern web applications. It is classified as a NoSQL database because it does not rely on a traditional table-based relational database structure.

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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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