Security Hardening

How to Install and Configure ISC DHCP Server on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install and Configure ISC DHCP Server on Debian 9

Introduction Deploying install and configure isc dhcp server on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites […]

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Alpine Linux edge — postgresql-common — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — postgresql-common — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0 📖 ~4 min read  •  Source: Alpine secdb entry — postgresql-common 0 Related CVEs: CVE-2019-3466 Upstream summary: Alpine main repository for vedge ships postgresql-common 0 which addresses CVE-2019-3466. Table of contents Symptom & Impact Environment […]

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Common Problems 120994

Debian 10 – dist-upgrade aborts with held broken packages

🟠 High   ⏱ 5–30 min  Last verified: 27 March 2020 Affected versions: Debian 10 📖 ~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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FreeBSD 12 — py33-pygments — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py33-pygments — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 March 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pygments — shell injection vulnerability Related CVEs: CVE-2015-8557 Upstream summary: NVD reports: The FontManager._get_nix_font_path function in formatters/img.py in Pygments 1.2.2 through 2.0.2 allows remote attackers to execute arbitrary commands via […]

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FreeBSD 12 — squirrelmail-multilogin-plugin — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — squirrelmail-multilogin-plugin — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 March 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: SquirrelMail — Plug-ins compromise Upstream summary: Problem Description: The SquirrelMail Web Server has been compromised, and three plugins are affected. The port of squirrelmail-sasql-plugin is safe (right MD5), and change_pass […]

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How to Set Up Open-iSCSI on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Open-iSCSI on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up set up open-iscsi on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the […]

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Amazon Linux 2 — ipmitool — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — ipmitool — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2020-1420 Related CVEs: CVE-2020-5208 Upstream summary: It's been found that multiple functions in ipmitool before 1.8.19 neglect proper checking of the data received from a remote LAN party, which may […]

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FreeBSD 12 — samba32-devel — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — samba32-devel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 March 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: samba — potential leakage of arbitrary memory contents Related CVEs: CVE-2008-4314 Upstream summary: Samba Team reports: Samba 3.0.29 and beyond contain a change to deal with gcc 4 optimizations. Part […]

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Common Problems 113552

Windows Server 2012 R2 Large File Copy Stalls at 99 Percent Over SMB 3 Encryption – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 27 March 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 16.04 — json-c — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — json-c — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 March 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4360-4 Related CVEs: CVE-2020-12762 https://launchpad.net/bugs/1878723 Upstream summary: USN-4360-1 fixed a vulnerability in json-c. The security fix introduced a memory leak that was reverted in USN-4360-2 and USN-4360-3. This update provides […]

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