Linux

How to Configure Audit Logging on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Audit Logging on CentOS Stream 9

Introduction This tutorial demonstrates how to Configure Audit Logging on CentOS Stream 9 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 […]

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Amazon Linux 2 — ant — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — ant — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2022-1880 Related CVEs: CVE-2021-36374 Upstream summary: When reading a specially crafted ZIP archive, or a derived formats, an Apache Ant build can be made to allocate large amounts of memory […]

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How to Set Up Sensu Monitoring on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Sensu Monitoring on Debian 9

Introduction How to Set Up Sensu Monitoring on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. […]

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Gentoo Linux — net-dns/unbound — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-dns/unbound — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202212-02 Related CVEs: CVE-2022-3204 CVE-2022-30698 CVE-2022-30699 Upstream summary: Multiple vulnerabilities have been discovered in Unbound. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & […]

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Debian 11 — asyncpg — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — asyncpg — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-17446 Upstream summary: asyncpg before 0.21.0 allows a malicious PostgreSQL server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, […]

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Debian 11 — yabasic — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — yabasic — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-19720 CVE-2019-19796 Upstream summary: Yabasic 2.86.1 has a heap-based buffer overflow in the yylex() function in flex.c via a crafted BASIC source file. Table of contents Symptom & […]

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Debian 11 — backuppc — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — backuppc — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 10 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3369 CVE-2011-3361 CVE-2011-4923 CVE-2011-5081 Upstream summary: CgiUserConfigEdit in BackupPC 3.1.0, when SSH keys and Rsync are in use in a multi-user environment, does not restrict users from the […]

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How to Configure OSPF with FRRouting on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure OSPF with FRRouting on Debian 11

Introduction Deploying configure ospf with frrouting on debian 11 on a Debian 11 Bullseye machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites You will […]

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Ubuntu 20.04 — libslirp — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libslirp — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 10 March 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5009-1 Related CVEs: CVE-2020-29129 CVE-2020-29130 CVE-2021-3592 CVE-2021-3593 CVE-2021-3594 CVE-2021-3595 CVE-2020-10756 Upstream summary: Qiuhao Li discovered that libslirp incorrectly handled certain header data lengths. An attacker inside a guest could possibly […]

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SLES 12 — colord — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — colord — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 10 March 2022 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3496-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-42523 CVE-2011-4349 Upstream summary: There are two Information Disclosure vulnerabilities in colord, and they lie in colord/src/cd-device-db.c and colord/src/cd-profile-db.c separately. They exist because the 'err_msg' […]

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