Linux

SLES 12 — mysql-connector-java — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — mysql-connector-java — multiple vulnerabilities (8 CVEs) — patch and remediation guide

  • February 17, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 17 February 2021 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:2591-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-3523 CVE-2021-2471 CVE-2020-2875 CVE-2020-2933 CVE-2020-2934 CVE-2015-2575 CVE-2017-3586 CVE-2017-3589 Upstream summary: Vulnerability in the MySQL Connectors component of Oracle MySQL (subcomponent: Connector/J). Supported versions that are […]

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How to Deploy an Application to Kubernetes on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Deploy an Application to Kubernetes on RHEL 7

  • February 17, 2021
  • Linux
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How to Deploy an Application to Kubernetes on RHEL 7 Deploying applications to Kubernetes involves more than simply running a container — it means defining how many replicas should run, how the application is exposed to network traffic, how it recovers from failure, and how updates are rolled out without downtime. Kubernetes provides two core […]

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Oracle Linux 8 — virt:ol and virt-devel:ol — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:ol and virt-devel:ol — security and stability fixes — required update (ELSA-2023-3822)

  • February 16, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 16 February 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-3822 Related CVEs: CVE-2023-2700 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 115056

RHEL 8 Postfix Mail Queue Stuck Due To DNS And Firewall Constraints

  • February 16, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 16 February 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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Common Problems 114928

RHEL 8 Firewalld Blocks Application Port After Policy Change

  • February 16, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 16 February 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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Ubuntu 14.04 — opensmtpd — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — opensmtpd — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • February 16, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 16 February 2021 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4875-1 Related CVEs: CVE-2020-7247 CVE-2020-8793 CVE-2020-8794 Upstream summary: It was discovered that OpenSMTPD incorrectly verified the sender's or receiver's e-mail addresses under certain conditions. An attacker could possibly use this […]

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Ubuntu 16.04 — audacity — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — audacity — vulnerability — patch and remediation guide

  • February 16, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 16 February 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7211-1 Related CVEs: CVE-2020-11867 Upstream summary: Mike Salvatore discovered that Audacity incorrectly handled default permissions of temporary files created by the application. An attacker could possibly use this issue to […]

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How To Use the Ruby on Rails 1-Click Install on the cloud provider — step-by-step Linux tutorial on Progressive Robot

How To Use the Ruby on Rails 1-Click Install on the cloud provider

  • February 16, 2021
  • Linux
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This tutorial will guide you through spinning up a cloud servers with Ruby on Rails pre-installed using the the cloud provider Ruby on Rails 1-Click App. After creating your Droplet, you’ll learn about some use cases and common commands. Since this 1-Click Droplet is based on a standard Ubuntu 20.04 Droplet, you can read more of our Ruby tutorials after this guide.

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Ubuntu 20.04 — php-pear — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — php-pear — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • February 16, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 16 February 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5027-1 Related CVEs: CVE-2021-32610 CVE-2020-36193 CVE-2020-28948 CVE-2020-28949 Upstream summary: It was discovered that PEAR incorrectly handled symbolic links in archives. A remote attacker could possibly use this issue to execute […]

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Gentoo Linux — net-p2p/deluge — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-p2p/deluge — vulnerability — patch and remediation guide

  • February 16, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202210-07 Related CVEs: CVE-2021-3427 Upstream summary: Deluge does not sufficiently sanitize crafted torrent file data, leading to the application interpreting untrusted data as HTML. Table of contents Symptom & Impact Environment & […]

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