Troubleshooting

Ubuntu 18.04 — kconfig — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — kconfig — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 April 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4100-1 Related CVEs: CVE-2016-6232 CVE-2019-14744 Upstream summary: It was discovered that KConfig and KDE libraries have a vulnerability where an attacker could hide malicious code under desktop and configuration files. […]

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How to Configure a Virtual Switch in Hyper-V on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure a Virtual Switch in Hyper-V on Windows Server 2012 R2

How to Configure a Virtual Switch in Hyper-V on Windows Server 2012 R2 Virtual switches are the networking backbone of a Hyper-V environment. Every virtual machine that needs network connectivity must be connected to a virtual switch, which in turn determines whether the VM can reach the physical network, communicate only with other VMs, or […]

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Ubuntu 18.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 April 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4442-2 Related CVEs: CVE-2018-1000550 CVE-2018-1000671 CVE-2020-10936 Upstream summary: USN-4442-1 fixed vulnerabilities in Sympa. This update provides the corresponding updates for Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. […]

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How to Install Rust and Compile System Tools on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Rust and Compile System Tools on RHEL 7

How to Install Rust and Compile System Tools on RHEL 7 Rust is a systems programming language that offers memory safety without a garbage collector, making it an ideal choice for building high-performance command-line utilities, daemons, and system-level tools. On RHEL 7, the system compiler and C runtime are older, but Rust’s installer rustup sidesteps […]

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Oracle Linux 8 — virt:ol — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:ol — vulnerability — patch and remediation guide (ELSA-2020-2774)

🟠 High   ⏱ 15–60 min  Last verified: 22 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2774 Related CVEs: CVE-2019-20382 CVE-2020-8608 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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openSUSE Tumbleweed — lftp — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — lftp — 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-2019:1059-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-10916 Upstream summary: It has been discovered that lftp up to and including version 4.8.3 does not properly sanitize remote file names, leading to a […]

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Oracle Linux 8 — python-lxml — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — python-lxml — vulnerability — patch and remediation guide (ELSA-2021-1898)

🟡 Medium   ⏱ 10–30 min  Last verified: 22 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1898 Related CVEs: CVE-2020-27783 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 113600

Windows Server 2012 R2 — RID master pool exhaustion approaching: new objects refused soon — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 21 April 2020 Affected versions: Windows Server 2012 R2 📖 ~2 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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FreeBSD 12 — openfire — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — openfire — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 21 April 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Openfire administration console authentication bypass Related CVEs: CVE-2008-1728 CVE-2008-6508 CVE-2008-6509 CVE-2008-6510 CVE-2008-6511 CVE-2009-0496 CVE-2009-0497 CVE-2009-1595  +2 more Upstream summary: [email protected] reports: Openfire's administrative console, a web-based application, was found to […]

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FreeBSD 12 — ssh2-nox — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — ssh2-nox — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 April 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: SSH.COM SFTP server — format string vulnerability Related CVEs: CVE-2006-0705 Upstream summary: SSH Communications Security Corp reports a format string vulnerability in their SFTP server. This vulnerability could cause a […]

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