Troubleshooting

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

FreeBSD 12 — jabber — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: fd_set — bitmap index overflow in multiple applications Related CVEs: CVE-2004-1378 Upstream summary: 3APA3A reports: If programmer fails to check socket number before using select() or fd_set macros, it's possible […]

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How to Set Up Fail2ban on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up Fail2ban on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up fail2ban on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. […]

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Ubuntu 16.04 — ibus — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — ibus — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4134-3 Related CVEs: CVE-2019-14822 https://launchpad.net/bugs/1844853 Upstream summary: USN-4134-1 fixed a vulnerability in IBus. The update caused a regression in some Qt applications and the fix was subsequently reverted in USN-4134-2. […]

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Ubuntu 14.04 — advancecomp — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — advancecomp — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2019 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-3936-1 Related CVEs: CVE-2019-9210 CVE-2018-1056 Upstream summary: It was discovered that AdvanceCOMP incorrectly handled certain PNG files. An attacker could possibly use this issue to execute arbitrary code. Table of […]

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How to Configure Remote Desktop Connection Broker on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Remote Desktop Connection Broker on Windows Server 2016

How to Configure Windows Server 2016 Remote Desktop Connection Broker Remote Desktop Connection Broker (RD Connection Broker) is the intelligence layer in a Windows Server 2016 Remote Desktop Services deployment. It manages session reconnection, load balancing across multiple RD Session Host servers, and publishing of RemoteApp programs and virtual desktops from a centralised collection. Without […]

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SLES 15 — libldns2 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libldns2 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 21 November 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2011:1161-1 (see also SUSE bugzilla) Related CVEs: CVE-2011-3581 Upstream summary: Heap-based buffer overflow in the ldns_rr_new_frm_str_internal function in ldns before 1.6.11 allows remote attackers to cause a denial of service (crash) and […]

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Oracle Linux 8 — file — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — file — vulnerability — patch and remediation guide (ELSA-2021-4374)

🟡 Medium   ⏱ 10–30 min  Last verified: 21 November 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4374 Related CVEs: CVE-2019-18218 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 Enable HTTP/2 with Nginx on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Enable HTTP/2 with Nginx on RHEL 7

How to Enable HTTP/2 with Nginx on RHEL 7 HTTP/2 is the major revision of the HTTP network protocol that brings multiplexed streams, header compression, and server push to web traffic. Compared to HTTP/1.1, HTTP/2 dramatically reduces page load times on sites with many assets by eliminating head-of-line blocking and reducing the overhead of repeated […]

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

openSUSE Tumbleweed — whois — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2011:0935-1 (see also SUSE bugzilla) Related CVEs: CVE-2011-2483 Upstream summary: crypt_blowfish before 1.1, as used in PHP before 5.3.7 on certain platforms, PostgreSQL before 8.4.9, and other products, does not properly handle […]

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How to Configure RAID with mdadm on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure RAID with mdadm on Debian 9

Introduction How to Configure RAID with mdadm 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 Debian 9. […]

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