🟡 Medium ⏱ 10–30 min Last verified: 2 August 2019 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4024-1 Related CVEs: https://launchpad.net/bugs/1794848 https://launchpad.net/bugs/1788929 CVE-2019-11459 Upstream summary: As a security improvement, this update adjusts the AppArmor profile for the Evince thumbnailer to reduce access to the system and adjusts […]
🟢 Low ⏱ 5–15 min Last verified: 2 August 2019 Affected versions: SLES 15 📖 ~4 min read • Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2012-4453 CVE-2016-8637 Upstream summary: dracut.sh in dracut, as used in Red Hat Enterprise Linux 6, Fedora 16 and 17, and possibly other products, creates initramfs […]
Automating repetitive tasks is one of the core responsibilities of a Linux system administrator. Red Hat Enterprise Linux 8 provides several scheduling mechanisms: the venerable cron daemon for recurring jobs, anacron for machines that are not always running, the at command for one-off deferred tasks, and systemd timers for tighter integration with the service manager. […]
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2017:1254-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-8422 CVE-2019-7443 Upstream summary: KDE kdelibs before 4.14.32 and KAuth before 5.34 allow local users to gain root privileges by spoofing a callerID and leveraging […]
🟡 Medium ⏱ 10–30 min Last verified: 2 August 2019 Affected versions: SLES 15 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2020:1296-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-18905 Upstream summary: A Insufficient Verification of Data Authenticity vulnerability in autoyast2 of SUSE Linux Enterprise Server 12, SUSE Linux Enterprise Server 15 allows remote […]
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read • Source: Arch ASA ASA-201611-29 Related CVEs: CVE-2016-1248 Upstream summary: Type: arbitrary command execution. Status: Fixed. Affected: 0.1.6-1. Fixed in: 0.1.7-1. Group: AVG-82. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
How to Set Up Automatic SSH Login Banners on RHEL 7 Displaying a clear, legally appropriate banner when users connect to a Linux server over SSH is both a security best practice and a compliance requirement in many regulated environments such as PCI-DSS, HIPAA, and government frameworks. On Red Hat Enterprise Linux 7, there are […]
How to Detect Rootkits with rkhunter and chkrootkit on RHEL 7 A rootkit is a collection of malicious software designed to maintain persistent, hidden access to a compromised system while concealing its presence from the administrator and standard system tools. Once installed, rootkits can replace core binaries, hide processes and network connections, and exfiltrate data […]
In this tutorial, you will set up Apache as a reverse proxy using the `mod_proxy` extension to redirect incoming connections to underlying application server(s) running on the same network. There are instructions on setting up a simple web app using the Flask framework to show how Apache interacts with the real application hidden behind it, but you can also follow this tutorial using your existing application server, if you have one.
🟢 Low ⏱ 5–15 min Last verified: 1 August 2019 Affected versions: Debian 10 (buster) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2018-20969 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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