July 2021 - Page 13 of 69

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

Debian 10 — connman — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-26675 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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Common Problems 114422

RHEL 9 Firewalld Zone Rules Not Taking Effect

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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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Ubuntu 20.04 — libnet-cidr-lite-perl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libnet-cidr-lite-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6712-1 Related CVEs: CVE-2021-47154 Upstream summary: It was discovered that Net::CIDR::Lite incorrectly handled extra zero characters at the beginning of IP address strings. A remote attacker could possibly use this […]

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How to Set Up Performance Monitoring on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up Performance Monitoring on Windows Server 2019

Introduction to Performance Monitoring on Windows Server 2019 Performance monitoring on Windows Server 2019 involves collecting, analyzing, and responding to metrics that describe the health and capacity of server resources including CPU, memory, disk, and network. Windows Server 2019 includes several built-in tools for performance monitoring: Performance Monitor (perfmon.exe) for real-time and historical counter collection, […]

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Ubuntu 14.04 — gmp — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — gmp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5672-2 Related CVEs: CVE-2021-43618 Upstream summary: USN-5672-1 fixed a vulnerability in GMP. This update provides the corresponsing update for Ubuntu 14.04 ESM. Original advisory details: It was discovered that GMP […]

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SLES 12 — libgmp10 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libgmp10 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2021:541-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-43618 Upstream summary: GNU Multiple Precision Arithmetic Library (GMP) through 6.2.1 has an mpz/inp_raw.c integer overflow and resultant buffer overflow via crafted input, leading to […]

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

Oracle Linux 8 — stunnel — vulnerability — patch and remediation guide (ELSA-2021-0618)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0618 Related CVEs: CVE-2021-20230 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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FreeBSD 13 — libressl — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — libressl — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: LibreSSL — overwrite and -read vulnerability Related CVEs: CVE-2014-8176 CVE-2015-0204 CVE-2015-0206 CVE-2015-0209 CVE-2015-0286 CVE-2015-0287 CVE-2015-0288 CVE-2015-0289  +12 more Upstream summary: The LibreSSL project reports: An incorrect length check can result […]

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