Package Management

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2021-9362)

  • August 9, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 9 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9362 Related CVEs: CVE-2021-23133 CVE-2020-25671 CVE-2021-33033 CVE-2020-25670 CVE-2021-32399 CVE-2020-25672 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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openSUSE Tumbleweed — libmono — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libmono — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • August 9, 2021
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory Related CVEs: CVE-2021-24112 CVE-2015-2318 CVE-2015-2319 CVE-2015-2320 Upstream summary: Unknown. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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FreeBSD 13 — openjdk — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — openjdk — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • August 9, 2021
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 9 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: java — multiple vulnerabilities Related CVEs: CVE-2012-4681 CVE-2013-0433 CVE-2015-4734 CVE-2015-4803 CVE-2015-4805 CVE-2015-4806 CVE-2015-4810 CVE-2015-4835  +12 more Upstream summary: Oracle reports: This Critical Patch Update contains 25 new security fixes for […]

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Oracle Linux 8 — microcode_ctl security, — bug-fix and enhancement update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — microcode_ctl security, — bug-fix and enhancement update (ELSA-2020-5085)

  • August 8, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 8 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5085 Related CVEs: CVE-2020-8696 CVE-2020-8695 CVE-2020-8698 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 118395

apt update Returns 404 Errors on Ubuntu 16.04

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 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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FreeBSD 13 — perl-threaded — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — perl-threaded — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • August 8, 2021
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 8 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: perl — denial of service via algorithmic complexity attack on hashing routines Related CVEs: CVE-2004-0452 CVE-2005-0155 CVE-2005-0156 CVE-2007-5116 CVE-2013-1667 Upstream summary: Perl developers report: In order to prevent an algorithmic […]

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Common Problems 117600

Ubuntu 20.04 LTS APT GPG Signature Verification Failed

  • August 8, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 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 Install Caddy Web Server on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Caddy Web Server on FreeBSD 13

  • August 8, 2021
  • FreeBSD
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Introduction This guide explains how to Install Caddy Web Server on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained […]

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FreeBSD 13 — metamail — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — metamail — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • August 8, 2021
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 8 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: metamail format string bugs and buffer overflows Related CVEs: CVE-2004-0104 CVE-2004-0105 Upstream summary: Ulf Härnhammar reported four bugs in metamail: two are format string bugs and two are buffer overflows. […]

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FreeBSD 13 — libgd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — libgd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • August 8, 2021
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 8 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libgd — Denial of servica via double free Related CVEs: CVE-2017-6362 CVE-2017-7890 Upstream summary: libgd developers report: Double free vulnerability in the gdImagePngPtr function in libgd2 before 2.2.5 allows remote […]

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