Common Problems

FreeBSD 13 — yamt — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — yamt — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 4 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: yamt — buffer overflow and directory traversal issues Related CVEs: CVE-2004-1302 CVE-2005-1846 CVE-2005-1847 Upstream summary: Stanislav Brabec discovered errors in yamt's path name handling that lead to buffer overflows and […]

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Ubuntu 20.04 — axel — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — axel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 August 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4872-1 Related CVEs: CVE-2020-13614 Upstream summary: It was discovered that Axel did not properly verify the certificates for hostnames. An attacker could use this vulnerability to impersonate another server and […]

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Arch Linux — dotnet-sdk — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — dotnet-sdk — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202103-20 Related CVEs: CVE-2021-26701 CVE-2021-24112 CVE-2021-1723 CVE-2021-1721 CVE-2021-31204 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 5.0.3.sdk103-2. Fixed in: 5.0.4.sdk104-1. Group: AVG-1698. Table of contents Symptom & Impact Environment […]

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Oracle Linux 8 — dotnet5.0 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet5.0 security and bugfix update (ELSA-2021-0476)

🟠 High   ⏱ 15–60 min  Last verified: 3 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0476 Related CVEs: CVE-2021-1721 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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IBM AIX 7.1 — CVE-2021-29712 — xss — patch and remediation guide — diagnosis and fix on IBM AIX 7.1

IBM AIX 7.1 — CVE-2021-29712 — xss — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 3 August 2021 Affected versions: IBM AIX 7.1 📖 ~4 min read  •  Source: NVD CVE-2021-29712, IBM Support Bulletin CVE: CVE-2021-29712 NVD summary: IBM InfoSphere Information Server 11.7 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus […]

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Common Problems 118071

Ubuntu 18.04 Docker Fails to Start After Upgrade

🟡 Medium   ⏱ 5–30 min  Last verified: 3 August 2021 📖 ~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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Common Problems 114891

DNF metadata download timeout on RHEL 8

🟡 Medium   ⏱ 5–30 min  Last verified: 3 August 2021 📖 ~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 13 — postfix-policyd-weight — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — postfix-policyd-weight — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: postfix-policyd-weight — working directory symlink vulnerability Upstream summary: postfix-policyd-weight does not check for symlink for its working directory. If the working directory is not already setup by the super root, […]

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FreeBSD 13 — vinagre — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — vinagre — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 August 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: vinagre — format string vulnerability Related CVEs: CVE-2008-5660 Upstream summary: CORE Security Technologies reports: A format string error has been found on the vinagre_utils_show_error() function that can be exploited via […]

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FreeBSD 12 — pjsip — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — pjsip — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 August 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pjsip — Race condition in SSL socket server Related CVEs: CVE-2021-32686 Upstream summary: pjsip reports: There are a couple of issues found in the SSL socket: A race condition between […]

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