Operations

Common Problems 112984

Windows Server 2016 — Group nesting depth limit hit causing membership not to resolve — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 7 September 2021 Affected versions: Windows Server 2016 📖 ~2 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 […]

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How to Enable the Active Directory Recycle Bin on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Enable the Active Directory Recycle Bin on Windows Server 2012 R2

How to Enable the Active Directory Recycle Bin on Windows Server 2012 R2 The Active Directory Recycle Bin is a feature that allows administrators to restore accidentally deleted AD objects — including users, groups, computers, and OUs — without requiring a authoritative restore from backup or restarting in DSRM mode. Introduced in Windows Server 2008 […]

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FreeBSD 13 — p5-libwww — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — p5-libwww — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 September 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: p5-libwww — possibility to remote servers to create file with a .(dot) character Related CVEs: CVE-2010-2253 Upstream summary: lwp-download in libwww-perl before 5.835 does not reject downloads to filenames that […]

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How to Set Up SSH Key-Based Authentication on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up SSH Key-Based Authentication on RHEL 8

Password-based SSH authentication is vulnerable to brute-force attacks and credential stuffing. SSH key-based authentication replaces passwords with a cryptographic key pair: a private key that stays on your local machine and a public key placed on the server. Even if an attacker discovers your server’s IP and SSH port, they cannot log in without the […]

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FreeBSD 12 — py38-tuf — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py38-tuf — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 September 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: The Update Framwork — path traversal vulnerability Related CVEs: CVE-2021-41131 Upstream summary: NVD reports: python-tuf is a Python reference implementation of The Update Framework (TUF). In both clients (`tuf/client` and […]

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Debian 11 — twitter-bootstrap4 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — twitter-bootstrap4 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-8331 Upstream summary: In Bootstrap before 3.4.1 and 4.3.x before 4.3.1, XSS is possible in the tooltip or popover data-template attribute. Table of contents Symptom & Impact Environment […]

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Debian 11 — chrony — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — chrony — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 7 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-0292 CVE-2010-0293 CVE-2010-0294 CVE-2012-4502 CVE-2012-4503 CVE-2014-0021 CVE-2015-1821 CVE-2015-1822  +3 more Upstream summary: The read_from_cmd_socket function in cmdmon.c in chronyd in Chrony before 1.23.1, and 1.24-pre1, allows remote attackers […]

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AlmaLinux 8 — libsass — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — libsass — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟡 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 […]

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Oracle Linux 8 — ghostscript — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ghostscript — security and stability fixes — required update (ELSA-2023-7053)

🟡 Medium   ⏱ 10–30 min  Last verified: 6 September 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-7053 Related CVEs: CVE-2023-38559 CVE-2023-4042 CVE-2023-28879 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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