Common Problems

Common Problems 113573

Windows Server 2012 R2 — RDP unreachable because TCP 3389 is blocked by firewall policy — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 May 2023 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Gentoo Linux — dev-libs/stb — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-libs/stb — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202409-15 Related CVEs: CVE-2021-28021 CVE-2021-37789 CVE-2021-42715 CVE-2021-42716 CVE-2022-28041 CVE-2022-28042 CVE-2022-28048 Upstream summary: Multiple vulnerabilities have been discovered in stb. Please review the CVE identifiers referenced below for details. Table of contents Symptom […]

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Common Problems 111774

Windows Server 2022 — Hyper-V VM export fails because destination ACLs deny write access — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 23 May 2023 Affected versions: Windows Server 2022 📖 ~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 […]

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Rocky Linux 8 — python-atomicwrites — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — python-atomicwrites — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2023:7050 Related CVEs: CVE-2007-4559 CVE-2023-32681 CVE-2020-10735 CVE-2021-28861 CVE-2022-45061 Upstream summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and […]

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IBM AIX 7.3 — CVE-1999-0055 — buffer overflow — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-1999-0055 — buffer overflow — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 23 May 2023 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-1999-0055, IBM Support Bulletin CVE: CVE-1999-0055 NVD summary: Buffer overflows in Sun libnsl allow root access. References: sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=col   www-1.ibm.com/support/search.wss?rs=0&q=IX80543&   sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=col Table of contents Symptom & Impact Environment & Reproduction Root […]

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Ubuntu 18.04 — varnish — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — varnish — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 May 2023 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7372-1 Related CVEs: CVE-2022-45060 CVE-2019-20637 CVE-2020-11653 CVE-2021-36740 CVE-2022-23959 Upstream summary: Martin van Kervel Smedshammer discovered that Varnish did not properly sanitize certain HTTP headers. A remote attacker could possibly use […]

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Windows Server 2019 — KB5030185 — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5030185 — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5030185 • MSRC update-guide entry Related CVEs: CVE-2023-36796 CVE-2023-36793 CVE-2023-36792 CVE-2023-36794 CVE-2023-36788 Affected components: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 Microsoft .NET Framework 3.5 AND 4.8 on Windows […]

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CentOS Stream 9 — mutt — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — mutt — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 May 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2024:2290 Related CVEs: CVE-2023-4874 CVE-2023-4875 CVE-2022-1328 Upstream summary: Mutt is a low resource, highly configurable, text-based MIME e-mail client. Mutt supports most e-mail storing formats, such as mbox and Maildir, as […]

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Alpine Linux 3.18 — opus — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — opus — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 0 📖 ~4 min read  •  Source: Alpine secdb entry — opus 0 Related CVEs: CVE-2022-25345 Upstream summary: Alpine main repository for vv3.18 ships opus 0 which addresses CVE-2022-25345. Table of contents Symptom & Impact Environment […]

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Oracle Linux 9 — gcc-toolset-13-gcc — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — gcc-toolset-13-gcc — vulnerability — patch and remediation guide (ELSA-2025-1309)

🟡 Medium   ⏱ 10–30 min  Last verified: 23 May 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-1309 Related CVEs: CVE-2020-11023 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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