Linux

CentOS Stream 9 — python3.11-cryptography — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — python3.11-cryptography — vulnerability — patch and remediation guide

  • February 21, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 21 February 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2024:2337 Related CVEs: CVE-2023-49083 Upstream summary: The python-cryptography packages contain a Python Cryptographic Authority's (PyCA's) cryptography library, which provides cryptographic primitives and recipes to Python developers. Security Fix(es): * python-cryptography: NULL-dereference […]

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Cara Mengamankan Nginx dengan Let's Encrypt pada Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Cara Mengamankan Nginx dengan Let’s Encrypt pada Ubuntu 20.04

  • February 21, 2023
  • Linux
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Let’s Encrypt adalah Otoritas Sertifikat (CA) yang menyediakan cara mudah untuk memperoleh dan menginstal sertifikat TLS/SSL gratis, yang dengan demikian mengaktifkan HTTPS terenkripsi pada server web. Ini menyederhanakan proses dengan menyediakan klien perangkat lunak, Certbot, yang berusaha mengotomatiskan sebagian besar (jika bukan semua) langkah yang diperlukan. Dalam tutorial ini, Anda akan menggunakan Certbot untuk memperoleh sertifikat SSL gratis untuk Nginx pada Ubuntu 20.04

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Oracle Linux 9 — .NET 9.0 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — .NET 9.0 security, bug fix, and — enhancement update — new behaviour and fixes

  • February 20, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 20 February 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-2668 Related CVEs: CVE-2025-24070 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 117487

Ubuntu 20.04 LTS – systemd service enters crash loop after package update – Fix & Prevention

  • February 20, 2023
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 20 February 2023 Affected versions: Ubuntu 20.04 LTS 📖 ~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 […]

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Amazon Linux 2 — kernel-livepatch-4.14.294-220.533 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.294-220.533 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • February 20, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2023-095 Related CVEs: CVE-2022-3524 CVE-2022-3564 CVE-2022-3621 CVE-2022-3649 Upstream summary: A vulnerability was found in Linux Kernel. It has been declared as problematic. Affected by this vulnerability is the function ipv6_renew_options […]

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Amazon Linux 2 — kernel-livepatch-4.14.320-243.544 — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.320-243.544 — multiple vulnerabilities (6 CVEs) — patch and remediation guide

  • February 20, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2023-154 Related CVEs: CVE-2023-4206 CVE-2023-4207 CVE-2023-4208 CVE-2023-4622 CVE-2023-4623 CVE-2023-4921 Upstream summary: A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to achieve local privilege escalation. When […]

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Debian 11 — libguestfs — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libguestfs — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • February 20, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 20 February 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-4127 CVE-2012-2690 CVE-2013-2124 CVE-2013-4419 CVE-2022-2211 Upstream summary: The Linux kernel before 3.2.2 does not properly restrict SG_IO ioctl calls, which allows local users to bypass intended restrictions on […]

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Ubuntu 22.04 — libhttp-daemon-perl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — libhttp-daemon-perl — vulnerability — patch and remediation guide

  • February 20, 2023
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 20 February 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5520-1 Related CVEs: CVE-2022-31081 Upstream summary: It was discovered that HTTP-Daemon incorrectly handled certain crafted requests. A remote attacker could possibly use this issue to perform an HTTP Request Smuggling […]

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Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide (ELSA-2022-1491)

  • February 20, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 20 February 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1491 Related CVEs: CVE-2022-21496 CVE-2022-21443 CVE-2022-21426 CVE-2022-21434 CVE-2022-21476 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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Red Hat Enterprise Linux 9 — perl-XML-Parser — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — perl-XML-Parser — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • February 20, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:9605 Related CVEs: CVE-2006-10002 CVE-2006-10003 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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