Security Hardening

Ubuntu 22.04 — tomcat9 — multiple vulnerabilities (18 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — tomcat9 — multiple vulnerabilities (18 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 April 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7562-1 Related CVEs: CVE-2024-24549 CVE-2024-34750 CVE-2024-23672 CVE-2023-42795 CVE-2024-38286 CVE-2023-45648 CVE-2023-28708 CVE-2024-21733  +10 more Upstream summary: It was discovered that Tomcat did not include the secure attribute for session cookies when […]

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Ubuntu 18.04 — gnutls28 — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — gnutls28 — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 April 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7742-1 Related CVEs: CVE-2025-32988 CVE-2025-32990 CVE-2025-6395 CVE-2023-5981 CVE-2021-4209 CVE-2022-2509 https://launchpad.net/bugs/1860656 https://launchpad.net/bugs/1858691  +5 more Upstream summary: It was discovered that GnuTLS incorrectly handled exporting Subject Alternative Name (SAN) entries containing an […]

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Alpine Linux 3.19 — ipython — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — ipython — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 7.31.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — ipython 7.31.1-r0 Related CVEs: CVE-2022-21699 Upstream summary: Alpine community repository for vv3.19 ships ipython 7.31.1-r0 which addresses CVE-2022-21699. Table of contents Symptom & Impact Environment […]

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

Oracle Linux 8 — firefox — vulnerability — patch and remediation guide (ELSA-2024-1912)

🟠 High   ⏱ 15–60 min  Last verified: 17 April 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-1912 Related CVEs: CVE-2024-3852 CVE-2024-3857 CVE-2024-3859 CVE-2024-2609 CVE-2024-3864 CVE-2024-3854 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Oracle Linux 8 — libtasn1 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libtasn1 — vulnerability — patch and remediation guide (ELSA-2025-4049)

🟡 Medium   ⏱ 10–30 min  Last verified: 17 April 2025 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-4049 Related CVEs: CVE-2024-12133 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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openSUSE Leap 15.6 — dovecot23 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — dovecot23 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2025:14715-1 (see also SUSE bugzilla) Related CVEs: CVE-2024-23184 CVE-2024-23185 Upstream summary: Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines […]

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Windows Server 2016 — KB5037763 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5037763 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5037763 • MSRC update-guide entry Related CVEs: CVE-2024-29996 CVE-2024-30006 CVE-2024-30008 CVE-2024-30009 CVE-2024-30010 CVE-2024-30011 CVE-2024-30014 CVE-2024-30015  +12 more Affected components: Windows Server 2016 Windows Server 2016 (Server Core installation) Table of contents Symptom […]

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Oracle Linux 9 — fence-agents — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — fence-agents — vulnerability — patch and remediation guide (ELSA-2024-6726)

🟠 High   ⏱ 15–60 min  Last verified: 17 April 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-6726 Related CVEs: CVE-2024-6345 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 9 — bind9.18 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — bind9.18 — vulnerability — patch and remediation guide (ELSA-2025-1670)

🟠 High   ⏱ 15–60 min  Last verified: 17 April 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-1670 Related CVEs: CVE-2024-11187 CVE-2024-12705 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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openSUSE Leap 15.6 — sssd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — sssd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:19610 (see also SUSE bugzilla) Related CVEs: CVE-2025-11561 CVE-2023-3758 Upstream summary: A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems. […]

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