Linux

Ubuntu 14.04 — snapd — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — snapd — multiple vulnerabilities (10 CVEs) — patch and remediation guide

  • May 30, 2022
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 30 May 2022 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5292-4 Related CVEs: https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1961365 https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1961791 CVE-2021-3155 CVE-2021-4120 CVE-2021-44730 CVE-2021-44731 CVE-2019-7303 https://launchpad.net/bugs/1812973  +2 more Upstream summary: USN-5292-1 fixed a vulnerability in snapd. Unfortunately that update introduced a regression that could break […]

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How to Apply CIS Benchmark Hardening to Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Apply CIS Benchmark Hardening to Debian 11

  • May 30, 2022
  • Linux
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Introduction This guide explains how to Apply CIS Benchmark Hardening to Debian 11 on Debian 11 Bullseye. Debian Bullseye 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 11 install with the […]

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Oracle Linux 8 — php:8.0 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — php:8.0 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-7624)

  • May 29, 2022
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 29 May 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7624 Related CVEs: CVE-2021-21708 CVE-2022-31625 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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Common Problems 120562

Debian 11: Nginx cannot bind to port 80

  • May 29, 2022
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 29 May 2022 Affected versions: Debian 11 📖 ~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 117030

Ubuntu 22.04 LTS PAM Configuration Error Locks Out Sudo Access

  • May 29, 2022
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 29 May 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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AlmaLinux 8 — unzip — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — unzip — vulnerability — patch and remediation guide

  • May 29, 2022
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:2098 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Debian 11 — golang-github-microcosm-cc-bluemonday — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — golang-github-microcosm-cc-bluemonday — vulnerability — patch and remediation guide

  • May 29, 2022
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 29 May 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-42576 Upstream summary: The bluemonday sanitizer before 1.0.16 for Go, and before 0.0.8 for Python (in pybluemonday), does not properly enforce policies associated with the SELECT, STYLE, and […]

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

Debian 11 — wheel — vulnerability — patch and remediation guide

  • May 29, 2022
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 29 May 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-40898 Upstream summary: An issue discovered in Python Packaging Authority (PyPA) Wheel 0.37.1 and earlier allows remote attackers to cause a denial of service via attacker controlled input […]

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How to Configure Docker Networking on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Docker Networking on RHEL 9

  • May 29, 2022
  • Linux
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Docker’s networking model allows containers to communicate with each other, with the host, and with external networks in a controlled, isolated manner. Docker creates three default networks: bridge (the default for standalone containers), host (shares the host’s network namespace — maximum performance, no isolation), and none (no networking). For production applications, custom bridge networks provide […]

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Alpine Linux edge — xterm — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — xterm — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • May 29, 2022
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 371-r0 📖 ~4 min read  •  Source: Alpine secdb entry — xterm 371-r0 Related CVEs: CVE-2022-24130 CVE-2021-27135 Upstream summary: Alpine community repository for vedge ships xterm 371-r0 which addresses CVE-2022-24130. Table of contents Symptom & Impact […]

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