Bind is an extremely flexible DNS server that can be configured in many different ways. In this guide, we will discuss how to install Bind on an Ubuntu 14.04 server and configure it as either a caching or forwarding DNS server. Leveraging a DNS server configured like this can help speed up DNS queries for client computers.
🟢 Low ⏱ 5–15 min Last verified: 17 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2022-1781 Related CVEs: CVE-2021-43813 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALEA-2020:4713 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2021:0577-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-22879 Upstream summary: Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server […]
Konfigurationsmanagement-Systeme dienen dazu, Administratoren und Bedienerteams die Kontrolle einer größeren Zahl von Servern zu erleichtern. Somit können Sie viele verschiedene Systeme automatisch von einem zentralen Ort aus steuern. Es gibt zwar viele beliebte…
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read • Source: Amazon Linux advisory ALAS2-2023-1999 Related CVEs: CVE-2021-3575 Upstream summary: A heap-based buffer overflow was found in OpenJPEG. This flaw allows an attacker to execute arbitrary code with the permissions of the application compiled […]
🟡 Medium ⏱ 10–30 min Last verified: 17 July 2021 Affected versions: SLES 12 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2022:0814-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-0561 CVE-2020-0499 CVE-2014-8962 CVE-2014-9028 Upstream summary: In append_to_verify_fifo_interleaved_ of stream_encoder.c, there is a possible out of bounds write due to a missing bounds check. This […]
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read • Source: Amazon Linux advisory ALAS2-2023-2018 Related CVEs: CVE-2020-27828 CVE-2021-26926 CVE-2021-26927 CVE-2021-3272 CVE-2021-3443 CVE-2021-3467 CVE-2016-9396 CVE-2017-1000050 Upstream summary: A flaw was found in the Jasper tool's jpc encoder. This flaw allows an attacker to craft […]
🟠 High ⏱ 15–60 min Last verified: 17 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-9141 Related CVEs: CVE-2021-27363 CVE-2020-25639 CVE-2020-28588 CVE-2020-27171 CVE-2021-27364 CVE-2021-3444 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
Even with SSH key-based authentication enabled, your server’s SSH port is still probed constantly by automated scanners. Fail2Ban monitors log files for repeated authentication failures and bans offending IP addresses by inserting temporary rules into the firewall. On RHEL 8, Fail2Ban integrates natively with firewalld, making it the right tool to complement the hardening steps […]
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