Linux

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 11 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-0817 CVE-2004-0579 CVE-2011-2776 CVE-2014-0470 Upstream summary: Format string vulnerability in super for Linux allows local users to gain root privileges via a long command line argument. Table of […]

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

Debian 11 — net-snmp — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 11 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-1170 CVE-2003-0935 CVE-2005-2177 CVE-2005-4837 CVE-2007-5846 CVE-2008-0960 CVE-2008-2292 CVE-2008-4309  +12 more Upstream summary: The handle_var_requests function in snmp_agent.c for the SNMP daemon in the Net-SNMP (formerly ucd-snmp) package 5.0.1 […]

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

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2021-0657)

🟠 High   ⏱ 15–60 min  Last verified: 11 January 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0657 Related CVEs: CVE-2021-23978 CVE-2021-23973 CVE-2021-23968 CVE-2021-23969 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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Amazon Linux 2 — flac — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — flac — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2283 Related CVEs: CVE-2020-22219 CVE-2021-0561 Upstream summary: Buffer Overflow vulnerability in function bitwriter_grow_ in flac before 1.4.0 allows remote attackers to run arbitrary code via crafted input to the encoder. […]

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Alpine Linux edge — wavpack — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — wavpack — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 5.5.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — wavpack 5.5.0-r0 Related CVEs: CVE-2021-44269 CVE-2020-35738 CVE-2019-1010319 CVE-2019-1010317 CVE-2019-1010315 CVE-2019-11498 CVE-2018-19840 CVE-2018-19841  +12 more Upstream summary: Alpine community repository for vedge ships wavpack 5.5.0-r0 which […]

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

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

🟠 High   ⏱ 15–60 min  Last verified: 11 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-0397 CVE-2004-0413 CVE-2004-0749 CVE-2004-1438 CVE-2006-1564 CVE-2007-2448 CVE-2009-2411 CVE-2010-3315  +12 more Upstream summary: Stack-based buffer overflow during the apr_time_t data conversion in Subversion 1.0.2 and earlier allows remote attackers […]

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Arch Linux — prometheus — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — prometheus — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202105-25 Related CVEs: CVE-2021-29622 Upstream summary: Type: open redirect. Status: Fixed. Affected: 2.26.0-2. Fixed in: 2.27.1-1. Group: AVG-1971. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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Common Problems 117500

Ubuntu 20.04 LTS Excessive Swap Usage Causes Slowness

🟡 Medium   ⏱ 5–30 min  Last verified: 11 January 2022 📖 ~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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Oracle Linux 8 — gnutls security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — gnutls security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2019-3600)

🟡 Medium   ⏱ 10–30 min  Last verified: 10 January 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3600 Related CVEs: CVE-2019-3836 CVE-2019-3829 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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How to Set Up Port Knocking on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Port Knocking on CentOS Stream 9

Introduction This tutorial demonstrates how to Set Up Port Knocking on CentOS Stream 9 on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the […]

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