Security Hardening

Debian 11 — tuxguitar — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — tuxguitar — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-3385 CVE-2020-14940 Upstream summary: TuxGuitar 1.2 places a zero-length directory name in the LD_LIBRARY_PATH, which allows local users to gain privileges via a Trojan horse shared library in […]

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Debian 11 — liboping — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — liboping — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3614 Upstream summary: liboping 1.3.2 allows users reading arbitrary files upon the local system. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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AlmaLinux 8 — nvmetcli — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — nvmetcli — 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-2021:4383 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 […]

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How to Configure Kerberos Authentication on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Kerberos Authentication on Windows Server 2019

Introduction to Kerberos Authentication Kerberos is the default authentication protocol for Windows domain environments. Introduced with Windows 2000 and continually improved in Windows Server 2019, Kerberos provides mutual authentication—both the client and the server verify each other’s identity—and uses tickets rather than transmitting passwords over the network. Understanding Kerberos is essential for troubleshooting authentication failures, […]

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Debian 11 — fprobe — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — fprobe — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-2148 Upstream summary: Unknown local vulnerability in the "change user" feature of Slava Astashonok Fprobe 1.0.5 and earlier has unknown impact and attack vectors. Table of contents Symptom […]

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Debian 11 — elfutils — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — elfutils — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2014-0172 CVE-2014-9447 CVE-2016-10254 CVE-2016-10255 CVE-2017-7607 CVE-2017-7608 CVE-2017-7609 CVE-2017-7610  +12 more Upstream summary: Integer overflow in the check_section function in dwarf_begin_elf.c in the libdw library, as used in elfutils […]

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

Ubuntu 14.04 — usbredir — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2021 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5784-1 Related CVEs: CVE-2021-3700 Upstream summary: It was discovered that usbredir incorrectly handled memory when serializing large amounts of data in the case of a slow or blocked destination. An […]

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FreeBSD 13 — qemu — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

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

🟠 High   ⏱ 15–60 min  Last verified: 15 November 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: qemu — denial of service vulnerability Related CVEs: CVE-2007-1320 CVE-2007-1321 CVE-2007-1322 CVE-2007-1323 CVE-2007-1366 CVE-2007-6227 CVE-2008-0928 CVE-2008-2004  +12 more Upstream summary: Daniel P. Berrange reports: The VNC server websockets decoder will […]

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Oracle Linux 8 — kernel — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2020-2102)

🟠 High   ⏱ 15–60 min  Last verified: 14 November 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2102 Related CVEs: CVE-2020-2732 CVE-2020-11884 CVE-2020-10711 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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AlmaLinux 8 — redfish-finder — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — redfish-finder — 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-2021:4209 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 […]

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