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 […]
🟡 Medium ⏱ 10–30 min Last verified: 16 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-4292 Related CVEs: CVE-2021-33620 CVE-2021-28662 CVE-2021-31807 CVE-2021-28651 CVE-2021-31808 CVE-2021-28652 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALSA-2021:1586 Related CVEs: CVE-2019-13012 CVE-2020-13543 CVE-2020-13584 CVE-2020-16125 CVE-2020-9948 CVE-2020-9951 CVE-2020-9983 CVE-2021-1817 +4 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read • Source: Gentoo GLSA GLSA-202107-22 Related CVEs: CVE-2021-33586 Upstream summary: InspIRCd incorrectly handled malformed PONG messages, resulting in access of freed memory. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]
🟢 Low ⏱ 5–15 min Last verified: 16 July 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2020-12066 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read • Source: Amazon Linux advisory ALAS2-2020-1422 Related CVEs: CVE-2020-10188 Upstream summary: utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute arbitrary code via short writes or urgent data, because of a […]
🟡 Medium ⏱ 10–30 min Last verified: 16 July 2021 Affected versions: SLES 15 📖 ~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' […]
🟠 High ⏱ 15–60 min Last verified: 16 July 2021 Affected versions: SLES 15 📖 ~4 min read • Source: SUSE advisory SUSE-CU-2022:2025-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-46828 Upstream summary: In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are […]
🟠 High ⏱ 15–60 min Last verified: 16 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-9451 Related CVEs: CVE-2021-22543 CVE-2021-3609 CVE-2021-3653 CVE-2021-3573 CVE-2021-3656 CVE-2020-36311 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
🟢 Low ⏱ 5–15 min Last verified: 16 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-9552 Related CVEs: CVE-2020-11023 CVE-2020-7656 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]
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