May 2021 - Page 9 of 69

Ubuntu 20.04 — openssl-ibmca — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — openssl-ibmca — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6046-1 Related CVEs: https://launchpad.net/bugs/2015454 Upstream summary: It was discovered that OpenSSL-ibmca incorrectly handled certain RSA decryption. An attacker could possibly use this issue to expose sensitive information. Table of contents […]

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FreeBSD 13 — mariadb104-server — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — mariadb104-server — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: MariaDB — Nullpointer dereference Related CVEs: CVE-2018-25032 CVE-2019-1543 CVE-2019-1547 CVE-2019-15601 CVE-2019-17543 CVE-2019-2730 CVE-2019-2731 CVE-2019-2737  +12 more Upstream summary: The MariaDB project reports: MariaDB Server is vulnerable to Denial of Service. […]

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Debian 10 — opensmtpd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — opensmtpd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-7247 CVE-2020-8794 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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How to Configure Suricata IDS/IPS on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Suricata IDS/IPS on RHEL 8

Suricata is a high-performance, open-source network threat detection engine that can operate as an Intrusion Detection System (IDS) to alert on suspicious traffic, or as an Intrusion Prevention System (IPS) to actively block it. On RHEL 8, Suricata integrates naturally with firewalld‘s NFQUEUE target for inline packet inspection, and its Lua scripting and Eve JSON […]

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AlmaLinux 8 — jasper — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — jasper — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4235 Related CVEs: CVE-2020-27828 CVE-2021-26926 CVE-2021-26927 CVE-2021-3272 Upstream summary: JasPer is an implementation of Part 1 of the JPEG 2000 image compression standard. Security Fix(es): * jasper: Heap-based buffer overflow in cp_create() […]

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Alpine Linux edge — lz4 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — lz4 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.9.3-r1 📖 ~4 min read  •  Source: Alpine secdb entry — lz4 1.9.3-r1 Related CVEs: CVE-2021-3520 CVE-2019-17543 Upstream summary: Alpine main repository for vedge ships lz4 1.9.3-r1 which addresses CVE-2021-3520. Table of contents Symptom & Impact […]

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