ubuntu

Ubuntu 18.04 — librecad — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — librecad — multiple vulnerabilities (7 CVEs) — patch and remediation guide

  • December 5, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 5 December 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5957-1 Related CVEs: CVE-2018-19105 CVE-2021-21898 CVE-2021-21899 CVE-2021-21900 CVE-2021-45341 CVE-2021-45342 CVE-2021-45343 Upstream summary: Cody Sixteen discovered that LibreCAD incorrectly handled memory when parsing DXF files. An attacker could use this issue […]

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Common Problems 117424

Ubuntu 20.04 LTS Netplan Apply Drops SSH Connectivity

  • December 4, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 4 December 2021 📖 ~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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How To Set Up a Chef 12 Configuration Management System on Ubuntu 14.04 Servers — step-by-step Linux tutorial on Progressive Robot

How To Set Up a Chef 12 Configuration Management System on Ubuntu 14.04 Servers

  • December 4, 2021
  • Linux
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As your infrastructure requirements expand, managing each server by hand becomes an increasingly difficult task. This difficulty is compounded by the requirement for reproducibility, which becomes necessary if a node fails or if horizontal scaling is needed. In this guide, we will set up a centralized Chef server which will store and serve configuration instructions and node profiling information.

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Ubuntu 20.04 — libxml-security-java — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libxml-security-java — vulnerability — patch and remediation guide

  • December 4, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 4 December 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5525-1 Related CVEs: CVE-2021-40690 Upstream summary: It was discovered that Apache XML Security for Java incorrectly passed a configuration property when creating specific key elements. This allows an attacker to […]

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Ubuntu 14.04 — gegl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — gegl — vulnerability — patch and remediation guide

  • December 3, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 3 December 2021 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5251-1 Related CVEs: CVE-2021-45463 Upstream summary: It was discovered that GEGL incorrectly filtered and escaped file path input data when using the C system() function for execution of the ImageMagick […]

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Ubuntu 18.04 — grub2-unsigned — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — grub2-unsigned — multiple vulnerabilities (7 CVEs) — patch and remediation guide

  • December 1, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 1 December 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4992-1 Related CVEs: CVE-2020-14372 CVE-2020-25632 CVE-2020-27749 CVE-2020-27779 CVE-2021-20225 CVE-2021-20233 https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass2021 Upstream summary: Máté Kukri discovered that the acpi command in GRUB 2 allowed privileged users to load crafted ACPI tables […]

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Common Problems 118949

Ubuntu 14.04 LTS – DNS resolution fails after network changes

  • November 30, 2021
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 30 November 2021 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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 […]

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