September 2019

Common Problems 118031

Ubuntu 18.04 Audio Output Missing After Restart

🟡 Medium   ⏱ 5–30 min  Last verified: 30 September 2019 📖 ~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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Common Problems 117908

Ubuntu 18.04 LTS – unattended-upgrades causes sustained CPU usage – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 30 September 2019 Affected versions: Ubuntu 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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Amazon Linux 2 — python-reportlab — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — python-reportlab — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2285 Related CVEs: CVE-2019-17626 CVE-2019-19450 Upstream summary: paraparser in ReportLab before 3.5.31 allows remote code execution because start_unichar in paraparser.py evaluates untrusted user input in a unichar element in a […]

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FreeBSD 12 — mupdf — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — mupdf — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mupdf — multiple vulnerabilities Related CVEs: CVE-2016-6265 CVE-2016-6525 Upstream summary: Tobias Kortkamp reports: Heap-based buffer overflow in the pdf_load_mesh_params function in pdf/pdf-shade.c in MuPDF allows remote attackers to cause a […]

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How to Configure an SMTP Server on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure an SMTP Server on Windows Server 2016

How to Configure Windows Server 2016 SMTP Server An SMTP (Simple Mail Transfer Protocol) server on Windows Server 2016 allows the server to send outbound email messages — for example, for application alerts, scheduled task notifications, or as a relay for internal applications. Windows Server 2016 includes an SMTP Server feature that can be configured […]

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How To Use Mytop to Monitor MySQL Performance — step-by-step Linux tutorial on Progressive Robot

How To Use Mytop to Monitor MySQL Performance

Mytop is an open source, command line tool used for monitoring MySQL performance. It was inspired by the Linux system monitoring tool named top and is similar to it in look and feel. Mytop connects to a MySQL server and summarizes the information in a useful format. Using mytop, we can monitor (in real-time) MySQL threads, queries, and uptime as well as see which user is running queries on which database, which are the slow queries, and more.

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FreeBSD 12 — popfile — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

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

🟢 Low   ⏱ 5–15 min  Last verified: 30 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: popfile file disclosure Upstream summary: John Graham-Cumming reports that certain configurations of POPFile may allow the retrieval of any files with the extensions .gif, .png, .ico, .css, as well as […]

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OpenBSD 7.6 — pfsyncook — errata 017_pfsyncook — reliability fix — syspatch and remediation — diagnosis and fix on OpenBSD 7.6

OpenBSD 7.6 — pfsyncook — errata 017_pfsyncook — reliability fix — syspatch and remediation

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.6 📖 ~4 min read  •  Source: OpenBSD 7.6 errata 017_pfsyncook Errata topic: Reliability: pfsyncook (All architectures) Issued: June 17, 2025 Upstream summary: When using syncookies in pf(4), new TCP connections could run into timeout due to integer underflow. Table of […]

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