Logging Monitoring

Common Problems 121155

Debian 10 Permissions Changed Incorrectly After Recursive chmod

🟠 High   ⏱ 5–30 min  Last verified: 13 June 2020 Affected versions: Debian 10 📖 ~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 117489

Ubuntu 20.04 external monitor not detected

🟡 Medium   ⏱ 5–30 min  Last verified: 13 June 2020 📖 ~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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FreeBSD 12 — sddm — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — sddm — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: X11 Session — SDDM allows unauthorised unlocking Related CVEs: CVE-2018-14345 Upstream summary: MITRE reports: An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not […]

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Common Problems 115004

RHEL 8 SSH Login Slow Due to DNS and GSSAPI

🟡 Medium   ⏱ 5–30 min  Last verified: 13 June 2020 📖 ~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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FreeBSD 12 — zeek — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — zeek — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: zeek — potential DoS vulnerability Upstream summary: Wojtulewicz of Corelight reports: A specially-crafted series of MIME headers sent via SMTP or HTTP could cause Zeek to use large amounts of […]

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How to Install Kibana on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Kibana on Debian 9

Introduction This guide explains how to Install Kibana on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with the standard repositories […]

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FreeBSD 12 — hadoop — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — hadoop — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 13 June 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: hadoop2 — unauthorized disclosure of data vulnerability Related CVEs: CVE-2014-0230 CVE-2014-7810 CVE-2015-1776 Upstream summary: Arun Suresh reports: RPC traffic from clients, potentially including authentication credentials, may be intercepted by a […]

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Ubuntu 16.04 — mqtt-client — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — mqtt-client — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 June 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6685-1 Related CVEs: CVE-2019-0222 Upstream summary: It was discovered that mqtt-client incorrectly handled memory while parsing malformed MQTT frames. An attacker could possibly use this issue to cause a crash, […]

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How to Set Up VLAN Tagging on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up VLAN Tagging on Debian 10

Introduction How to Set Up VLAN Tagging on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. […]

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Ubuntu 18.04 — pam-python — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — pam-python — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 June 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4552-3 Related CVEs: CVE-2019-16729 Upstream summary: USN-4552-1 and USN-4552-2 fixed a vulnerability in Pam-python. The update introduced a regression which prevented PAM modules written in Python from importing python modules […]

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