Linux

Oracle Linux 9 — GraalVM — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — GraalVM — vulnerability — patch and remediation guide (ELSA-2023-12317)

🟠 High   ⏱ 15–60 min  Last verified: 16 October 2022 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12317 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 […]

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How to Configure sudo and Sudoers on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure sudo and Sudoers on RHEL 8

The sudo command allows permitted users to execute commands as root or another user without sharing the root password, making it the preferred mechanism for privilege escalation on RHEL 8. Properly configuring sudo is a foundational security task: it creates an auditable record of privileged actions and limits blast radius when accounts are compromised. This […]

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Common Problems 120512

Debian 11: Network outage from ifupdown and NetworkManager conflict

🟠 High   ⏱ 5–30 min  Last verified: 15 October 2022 Affected versions: Debian 11 📖 ~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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Common Problems 116954

Ubuntu 22.04 LTS Boot Fails Due to Invalid fstab UUID

🟡 Medium   ⏱ 5–30 min  Last verified: 15 October 2022 📖 ~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 & Cross-Refs References & Further […]

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AlmaLinux 9 — conmon — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — conmon — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2023:2222 Related CVEs: CVE-2022-41717 Upstream summary: Conmon is an OCI container runtime monitor. Security Fix(es): * golang: net/http: excessive memory growth in a Go server accepting HTTP/2 requests (CVE-2022-41717) For more details […]

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Debian 11 — sdl-mixer1.2 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — sdl-mixer1.2 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-6720 Upstream summary: libmikmod 3.1.9 through 3.2.0, as used by MikMod, SDL-mixer, and possibly other products, relies on the channel count of the last loaded song, rather than […]

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Debian 11 — po4a — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — po4a — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-4462 Upstream summary: lib/Locale/Po4a/Po.pm in po4a before 0.32 allows local users to overwrite arbitrary files via a symlink attack on the gettextization.failed.po temporary file. Table of contents Symptom […]

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Debian 11 — libtoxcore — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libtoxcore — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-25021 CVE-2018-25022 CVE-2021-44847 Upstream summary: The TCP Server module in toxcore before 0.2.8 doesn't free the TCP priority queue under certain conditions, which allows a remote attacker to […]

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How to Automate Debian 11 Server Provisioning with Ansible — step-by-step Debian 11 tutorial on Progressive Robot

How to Automate Debian 11 Server Provisioning with Ansible

Introduction Deploying automate debian 11 server provisioning with ansible 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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Debian 11 — awstats — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — awstats — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-0116 CVE-2005-0362 CVE-2005-0363 CVE-2005-0435 CVE-2005-0436 CVE-2005-0437 CVE-2005-0438 CVE-2005-1527  +12 more Upstream summary: AWStats 6.1, and other versions before 6.3, allows remote attackers to execute arbitrary commands via shell […]

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