Security Hardening

Common Problems 114397

DNF Is Locked By Another Process

🟡 Medium   ⏱ 5–30 min  Last verified: 31 December 2025 📖 ~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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FreeBSD 15 — rxvt-unicode — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — rxvt-unicode — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2025 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: rxvt-unicode is vulnerable to a remote code execution Related CVEs: CVE-2022-4170 Upstream summary: Marc Lehmann reports: The biggest issue is resolving CVE-2022-4170, which allows command execution inside urxvt from within […]

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FreeBSD 15 — py39-Elixir — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — py39-Elixir — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2025 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py39-Elixir — weak use of cryptography Related CVEs: CVE-2012-2146 Upstream summary: Red Hat Security Response Team reports: Elixir 0.8.0 uses Blowfish in CFB mode without constructing a unique initialization vector […]

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Debian 13 — libquartz-java — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libquartz-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-13990 Upstream summary: initDocumentParser in xml/XMLSchedulingDataProcessor.java in Terracotta Quartz Scheduler through 2.3.0 allows XXE attacks via a job description. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Windows Server 2025 — KB5074204 — security update — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5074204 — security update — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5074204 • MSRC update-guide entry Related CVEs: CVE-2025-54100 Affected components: Windows Server 2025 Microsoft summary: Improper neutralization of special elements used in a command ('command injection') in Windows PowerShell allows an unauthorized […]

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Debian 13 — libnet-oauth-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libnet-oauth-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-22376 Upstream summary: In Net::OAuth::Client in the Net::OAuth package before 0.29 for Perl, the default nonce is a 32-bit integer generated from the built-in rand() function, which is not […]

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Debian 13 — klibc — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — klibc — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 31 December 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-1930 CVE-2021-31870 CVE-2021-31871 CVE-2021-31872 CVE-2021-31873 Upstream summary: In klibc 1.5.20 and 1.5.21, the DHCP options written by ipconfig to /tmp/net-$DEVICE.conf are not properly escaped. This may allow a […]

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Debian 13 — jpegqs — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — jpegqs — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-35434 Upstream summary: jpeg-quantsmooth before commit 8879454 contained a floating point exception (FPE) via /jpeg-quantsmooth/jpegqs+0x4f5d6c. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Debian 13 — pywebdav — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — pywebdav — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-0432 Upstream summary: Multiple SQL injection vulnerabilities in the get_userinfo method in the MySQLAuthHandler class in DAVServer/mysqlauth.py in PyWebDAV before 0.9.4.1 allow remote attackers to execute arbitrary SQL […]

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AlmaLinux 8 — perl-Sub-Exporter — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — perl-Sub-Exporter — multiple vulnerabilities (2 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-2026:8096 Related CVEs: CVE-2025-40909 CVE-2023-47038 Upstream summary: Perl is a high-level programming language that is commonly used for system administration utilities and web programming. Security Fix(es): * perl: Perl threads have a […]

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