Troubleshooting

Ubuntu 18.04 — libvncserver — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libvncserver — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • January 20, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 20 January 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4636-1 Related CVEs: CVE-2020-25708 CVE-2019-20839 CVE-2019-20840 CVE-2020-14396 CVE-2020-14397 CVE-2020-14398 CVE-2020-14399 CVE-2020-14400  +12 more Upstream summary: It was discovered that LibVNCServer incorrectly handled certain internals. An attacker could possibly use this […]

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How to Encrypt Disk Partitions with LUKS on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Encrypt Disk Partitions with LUKS on Debian 10

  • January 20, 2020
  • Linux
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Introduction This guide explains how to Encrypt Disk Partitions with LUKS on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with […]

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SLES 12 — wicked — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — wicked — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • January 20, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 20 January 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2020:800-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-18902 CVE-2019-18903 CVE-2020-7216 CVE-2020-7217 Upstream summary: A Use After Free vulnerability in wicked of SUSE Linux Enterprise Server 12, SUSE Linux Enterprise Server 15; openSUSE […]

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SLES 15 — libexif12 — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libexif12 — multiple vulnerabilities (19 CVEs) — patch and remediation guide

  • January 20, 2020
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 20 January 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:1534-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-13112 CVE-2020-0452 CVE-2019-9278 CVE-2020-13113 CVE-2020-0181 CVE-2020-0198 CVE-2012-2812 CVE-2012-2813  +11 more Upstream summary: An issue was discovered in libexif before 0.6.22. Several buffer over-reads in EXIF […]

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How to Set Up Uptime Kuma for Service Monitoring on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up Uptime Kuma for Service Monitoring on RHEL 8

  • January 20, 2020
  • Linux
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Uptime Kuma is a self-hosted monitoring tool that provides a clean web interface for tracking the availability of HTTP endpoints, TCP ports, DNS records, and ping targets. On RHEL 8, you can deploy it quickly using Docker or run it directly with Node.js managed by PM2. This tutorial walks through both installation methods, configuring monitors, […]

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FreeBSD 12 — apache+mod_ssl+mod_accel+ipv — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — apache+mod_ssl+mod_accel+ipv — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • January 19, 2020
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 19 January 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: apache — Prevent chunk-size integer overflow on platforms where sizeof(int) < sizeof(long) Related CVEs: CVE-2005-2088 CVE-2005-3352 CVE-2006-3747 Upstream summary: Apache ChangeLog reports: Integer overflow in the ap_proxy_send_fb function in proxy/proxy_util.c […]

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Common Problems 115130

RPM database corruption prevents package operations – RHEL 8 Post 021

🟡 Medium   ⏱ 5–30 min  Last verified: 19 January 2020 📖 ~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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How to Configure AIX Trusted Computing Base (TCB) on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure AIX Trusted Computing Base (TCB) on IBM AIX 7.1

  • January 19, 2020
  • IBM AIX
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Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure aix trusted computing base (tcb) on ibm aix […]

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How to Encrypt Disk Partitions with LUKS on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Encrypt Disk Partitions with LUKS on Debian 9

  • January 19, 2020
  • Linux
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Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up encrypt disk partitions with luks on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully […]

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