Linux

Common Problems 117989

Ubuntu 18.04 LTS Package Dependency Errors After Partial Upgrade

🟠 High   ⏱ 5–30 min  Last verified: 13 October 2022 Affected versions: 18.04 LTS 📖 ~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 & […]

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Common Problems 116945

Ubuntu 22.04 LTS – SSH key login fails due to ~/.ssh permissions – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 October 2022 Affected versions: Ubuntu 22.04 LTS 📖 ~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 […]

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How to Set Up a PXE Boot Server on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up a PXE Boot Server on RHEL 9

PXE (Preboot Execution Environment) booting allows machines to boot from the network and install an operating system without a physical installation medium. This is invaluable for data centres and labs where provisioning dozens or hundreds of machines manually is impractical. On RHEL 9, you can build a complete PXE infrastructure using TFTP for boot file […]

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Debian 11 — wordpress-shibboleth — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — wordpress-shibboleth — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-14313 Upstream summary: The shibboleth_login_form function in shibboleth.php in the Shibboleth plugin before 1.8 for WordPress is prone to an XSS vulnerability due to improper use of add_query_arg(). […]

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

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

🟠 High   ⏱ 15–60 min  Last verified: 13 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-4203 CVE-2010-4489 CVE-2012-0823 CVE-2014-1578 CVE-2015-1258 CVE-2015-4485 CVE-2015-4486 CVE-2015-4506  +12 more Upstream summary: WebM libvpx (aka the VP8 Codec SDK) before 0.9.5, as used in Google Chrome before 7.0.517.44, […]

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Debian 11 — cron — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — cron — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 13 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2006-2607 CVE-2017-9525 CVE-2019-9704 CVE-2019-9705 CVE-2019-9706 Upstream summary: do_command.c in Vixie cron (vixie-cron) 4.1 does not check the return code of a setuid call, which might allow local users […]

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openSUSE Tumbleweed — fscrypt — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — fscrypt — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory Related CVEs: CVE-2022-25328 CVE-2022-25326 CVE-2022-25327 Upstream summary: The bash_completion script for fscrypt allows injection of commands via crafted mountpoint paths, allowing privilege escalation under a specific set of circumstances. A local […]

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Ubuntu 22.04 — xfce4-settings — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — xfce4-settings — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 October 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6141-1 Related CVEs: CVE-2022-45062 Upstream summary: Robin Peraglie and Johannes Moritz discovered that xfce4-settings incorrectly parsed quoted input when processed through xdg-open. A remote attacker could possibly use this issue […]

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

Oracle Linux 8 — libinput — vulnerability — patch and remediation guide (ELSA-2022-5331)

🟡 Medium   ⏱ 10–30 min  Last verified: 13 October 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5331 Related CVEs: CVE-2022-1215 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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