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Common Problems 117530

Ubuntu 20.04 LTS Cron Jobs Miss Scheduled Run

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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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Debian 11 — libtwelvemonkeys-java — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libtwelvemonkeys-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-23792 Upstream summary: The package com.twelvemonkeys.imageio:imageio-metadata before 3.7.1 are vulnerable to XML External Entity (XXE) Injection due to an insecurely initialized XML parser for reading XMP Metadata. An […]

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FreeBSD 13 — wget-devel — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — wget-devel — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: wget — multiple HTTP client download filename vulnerability Related CVEs: CVE-2004-1487 CVE-2004-1488 CVE-2010-2252 Upstream summary: GNU Wget version 1.12 and earlier uses a server-provided filename instead of the original URL […]

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

Debian 11 — proxytunnel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-2440 Upstream summary: Unspecified vulnerability in cmdline.c in proxytunnel 1.1.3 and earlier allows local users to obtain proxy credentials (username or password) of other users. Table of contents […]

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Debian 11 — cgit — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — cgit — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-1899 CVE-2016-1900 CVE-2016-1901 CVE-2018-14912 Upstream summary: CRLF injection vulnerability in the ui-blob handler in CGit before 0.12 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP […]

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Understanding the GraphQL Type System — step-by-step DevOps tutorial on Progressive Robot

Understanding the GraphQL Type System

GraphQL is a modern solution for facilitating the communication between a front end and a data source. In order to write a functioning GraphQL schema, you must understand the GraphQL Type System. In this article, you will learn about the five built-in scalar types, Enums, Object types (and the abstract types that work alongside them), and the List and Non-Null wrapping types. You will see examples for each type and learn how to use them to build a complete GraphQL schema.

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How to Write Conditional Statements in Python 3: Complete Guide (2025–2026)

How to Write Conditional Statements in Python 3: Complete Guide (2025–2026)

Learning how to write conditional statements in Python 3 is one of the most fundamental and frequently used skills in programming — conditional statements (if, elif, else) let your program make decisions, control flow, validate input, handle different cases, and respond intelligently to data, making them essential for almost every real-world Python script (games, automation, web apps, data analysis, CLI tools, AI logic).

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Debian 11 — xli — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — xli — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2001-0775 CVE-2005-0638 CVE-2005-0639 CVE-2005-3178 Upstream summary: Buffer overflow in xloadimage 4.1 (aka xli 1.16 and 1.17) in Linux allows remote attackers to execute arbitrary code via a FACES […]

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

Debian 11 — node-mysql — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-9244 CVE-2019-14939 Upstream summary: Keys of objects in mysql node module v2.0.0-alpha7 and earlier are not escaped with `mysql.escape()` which could lead to SQL Injection. Table of contents […]

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Ubuntu 20.04 — weechat — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — weechat — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5258-1 Related CVEs: CVE-2017-14727 CVE-2020-8955 CVE-2020-9759 CVE-2020-9760 CVE-2021-40516 Upstream summary: Stuart Nevans Locke discovered that WeeChat's relay plugin insecurely handled malformed websocket frames. A remote attacker in control of a […]

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