Package Management

Ubuntu 20.04 — grub2-signed — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — grub2-signed — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • November 6, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 6 November 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6410-1 Related CVEs: CVE-2023-4692 CVE-2023-4693 CVE-2022-28737 CVE-2021-3695 CVE-2021-3696 CVE-2021-3697 CVE-2021-3981 CVE-2022-28733  +12 more Upstream summary: It was discovered that a specially crafted file system image could cause a heap-based out-of-bounds […]

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NetBSD 9.4 — libzip — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — libzip — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • November 6, 2023
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2019-17582 CVE-2012-1162 CVE-2012-1163 CVE-2017-12858 CVE-2017-14107 Upstream summary: pkgsrc audit-packages flagged libzip<1.3.0 for vulnerability class 'use-after-free'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2019-17582 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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How to Install and Configure Fail2ban on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install and Configure Fail2ban on Debian 12

  • November 6, 2023
  • Linux
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Introduction This guide explains how to Install and Configure Fail2ban on Debian 12 on Debian 12 Bookworm. Debian Bookworm 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 12 install with the […]

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Alpine Linux 3.18 — prometheus-node-exporter — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — prometheus-node-exporter — vulnerability — patch and remediation guide

  • November 6, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 1.5.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — prometheus-node-exporter 1.5.0-r0 Related CVEs: CVE-2022-46146 Upstream summary: Alpine community repository for vv3.18 ships prometheus-node-exporter 1.5.0-r0 which addresses CVE-2022-46146. Table of contents Symptom & Impact Environment […]

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Oracle Linux 9 — kernel — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — kernel — security and stability fixes — required update (ELSA-2024-2758)

  • November 5, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 5 November 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-2758 Related CVEs: CVE-2024-25742 CVE-2023-6240 CVE-2024-25743 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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Amazon Linux 2023 — yajl — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — yajl — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • November 5, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2023-279 Related CVEs: CVE-2023-33460 CVE-2022-24795 Upstream summary: There's a memory leak in yajl 2.1.0 with use of yajl_tree_parse function. which will cause out-of-memory in server and cause crash. (CVE-2023-33460) Table […]

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How to Configure CentOS Stream 9 for OpenStack — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure CentOS Stream 9 for OpenStack

  • November 5, 2023
  • CentOS
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Introduction This tutorial demonstrates how to Configure CentOS Stream 9 for OpenStack on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the default AppStream […]

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Debian 12 — borgbackup — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — borgbackup — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • November 5, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 5 November 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-10099 CVE-2016-10100 CVE-2017-15914 CVE-2023-36811 Upstream summary: Borg (aka BorgBackup) before 1.0.9 has a flaw in the cryptographic protocol used to authenticate the manifest (list of archives), potentially allowing […]

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Debian 12 — sane-backends — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — sane-backends — multiple vulnerabilities (16 CVEs) — patch and remediation guide

  • November 5, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 5 November 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0773 CVE-2003-0774 CVE-2003-0775 CVE-2003-0776 CVE-2003-0777 CVE-2003-0778 CVE-2017-6318 CVE-2020-12861  +8 more Upstream summary: saned in sane-backends 1.0.7 and earlier does not check the IP address of the connecting host […]

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NetBSD 9.4 — usenet_reborn — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — usenet_reborn — vulnerability — patch and remediation guide

  • November 5, 2023
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Upstream summary: pkgsrc audit-packages flagged usenet_reborn-[0-9]* for vulnerability class 'unknown'. Reference: https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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