chris

Common Problems 117535

SSH Connection Refused After Enabling UFW

🟠 High   ⏱ 5–30 min  Last verified: 1 July 2021 Affected versions: 20.04 📖 ~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 […]

Read more
Common Problems 112456

Windows Server 2019 — WinRM listener fails to bind on Windows Server 2019 — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 1 July 2021 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 […]

Read more
FreeBSD 13 — py27-ecdsa — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py27-ecdsa — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: security/py-ecdsa — multiple issues Related CVEs: CVE-2019-14853 CVE-2019-14859 Upstream summary: py-ecdsa developers report: Fix CVE-2019-14853 – possible DoS caused by malformed signature decoding. Fix CVE-2019-14859 – signature malleability caused by […]

Read more
FreeBSD 13 — v8-devel — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — v8-devel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: node, iojs, and v8 — denial of service Related CVEs: CVE-2015-5380 Upstream summary: node reports: This release of Node.js fixes a bug that triggers an out-of-band write in V8's utf-8 […]

Read more
AlmaLinux 8 — pmdk — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — pmdk — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2022:1943 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

Read more
FreeBSD 12 — py27-bleach — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py27-bleach — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 July 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-bleach — regular expression denial-of-service Related CVEs: CVE-2020-6817 Upstream summary: Bleach developers reports: bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to […]

Read more
How to Install Terraform on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Terraform on RHEL 7

How to Install Terraform on RHEL 7 Terraform is HashiCorp’s open-source Infrastructure as Code (IaC) tool that lets you define, provision, and manage cloud infrastructure using declarative configuration files. Instead of manually clicking through cloud consoles or writing fragile shell scripts, Terraform allows you to describe your desired infrastructure state — virtual machines, networks, storage […]

Read more
AlmaLinux 8 — libuser — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — libuser — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:2040 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

Read more
CHAT