Security Hardening

Gentoo Linux — app-admin/logcheck — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-admin/logcheck — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202209-10 Related CVEs: CVE-2017-20148 Upstream summary: The pkg_postinst phase of the Logcheck ebuilds recursively chown the /etc/logcheck and /var/lib/logcheck directories. If the logcheck adds hardlinks to other files in these directories, the […]

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FreeBSD 12 — jabber — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — jabber — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: fd_set — bitmap index overflow in multiple applications Related CVEs: CVE-2004-1378 Upstream summary: 3APA3A reports: If programmer fails to check socket number before using select() or fd_set macros, it's possible […]

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How to Set Up Fail2ban on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up Fail2ban on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up fail2ban on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. […]

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Ubuntu 16.04 — ibus — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — ibus — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4134-3 Related CVEs: CVE-2019-14822 https://launchpad.net/bugs/1844853 Upstream summary: USN-4134-1 fixed a vulnerability in IBus. The update caused a regression in some Qt applications and the fix was subsequently reverted in USN-4134-2. […]

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Ubuntu 14.04 — advancecomp — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — advancecomp — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2019 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-3936-1 Related CVEs: CVE-2019-9210 CVE-2018-1056 Upstream summary: It was discovered that AdvanceCOMP incorrectly handled certain PNG files. An attacker could possibly use this issue to execute arbitrary code. Table of […]

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SLES 15 — libldns2 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libldns2 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 21 November 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2011:1161-1 (see also SUSE bugzilla) Related CVEs: CVE-2011-3581 Upstream summary: Heap-based buffer overflow in the ldns_rr_new_frm_str_internal function in ldns before 1.6.11 allows remote attackers to cause a denial of service (crash) and […]

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

Oracle Linux 8 — file — vulnerability — patch and remediation guide (ELSA-2021-4374)

🟡 Medium   ⏱ 10–30 min  Last verified: 21 November 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4374 Related CVEs: CVE-2019-18218 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 Tumbleweed — whois — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — whois — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2011:0935-1 (see also SUSE bugzilla) Related CVEs: CVE-2011-2483 Upstream summary: crypt_blowfish before 1.1, as used in PHP before 5.3.7 on certain platforms, PostgreSQL before 8.4.9, and other products, does not properly handle […]

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How to Configure RAID with mdadm on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure RAID with mdadm on Debian 9

Introduction How to Configure RAID with mdadm 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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FreeBSD 12 — atril — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — atril — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: evince and atril — command injection vulnerability in CBT handler Related CVEs: CVE-2017-1000083 Upstream summary: GNOME reports: The comic book backend in evince 3.24.0 (and earlier) is vulnerable to a […]

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