Common Problems

Ubuntu 16.04 — mailman — multiple vulnerabilities (15 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — mailman — multiple vulnerabilities (15 CVEs) — patch and remediation guide

  • June 21, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 21 June 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8067-1 Related CVEs: CVE-2021-44227 CVE-2021-43331 CVE-2021-43332 https://launchpad.net/bugs/1949401 https://launchpad.net/mailman/+bug/1949403 CVE-2021-42096 CVE-2021-42097 CVE-2020-15011  +7 more Upstream summary: It was discovered that Mailman incorrectly handled CSRF tokens. A remote list member or moderator […]

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openSUSE Tumbleweed — python36-pydantic — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-pydantic — vulnerability — patch and remediation guide

  • June 21, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2021-29510 Upstream summary: Pydantic is a data validation and settings management using Python type hinting. In affected versions passing either `'infinity'`, `'inf'` or `float('inf')` (or […]

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

Oracle Linux 8 — binutils — vulnerability — patch and remediation guide (ELSA-2021-4595)

  • June 21, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 21 June 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4595 Related CVEs: CVE-2021-42574 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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

Oracle Linux 8 — grilo — vulnerability — patch and remediation guide (ELSA-2021-4339)

  • June 21, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 21 June 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4339 Related CVEs: CVE-2021-39365 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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

Oracle Linux 8 — glibc — vulnerability — patch and remediation guide (ELSA-2021-9344)

  • June 21, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 21 June 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9344 Related CVEs: CVE-2019-25013 CVE-2020-27618 CVE-2019-9169 CVE-2016-10228 CVE-2021-3326 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Oracle Linux 8 — gcc — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — gcc — security and stability fixes — required update (ELSA-2021-4386)

  • June 20, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 20 June 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4386 Related CVEs: CVE-2018-20673 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 117494

Ubuntu 20.04 LTS NTP Time Drift Breaks TLS and Authentication

  • June 20, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 20 June 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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AlmaLinux 8 — hostapd — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — hostapd — vulnerability — patch and remediation guide

  • June 20, 2021
  • 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-2022:1938 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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