Common Problems

Debian 11 — libnet-cidr-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libnet-cidr-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-4456 Upstream summary: Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact. The functions `addr2cidr` and `cidrlookup` may return […]

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Common Problems 111722

Windows Server 2022 — Hyper-V Containers show nested virtualization startup failures — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 31 December 2022 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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Gentoo Linux — net-mail/dovecot — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-mail/dovecot — multiple vulnerabilities (8 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-202310-19 Related CVEs: CVE-2022-30550 CVE-2020-24386 CVE-2020-25275 CVE-2020-12100 CVE-2020-12673 CVE-2020-12674 CVE-2021-29157 CVE-2021-33515 Upstream summary: A vulnerability has been discovered in Dovecot. Please review the CVE identifier referenced below for details. Table of contents […]

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Debian 11 — libntlm — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libntlm — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-17455 Upstream summary: Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read […]

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Debian 11 — simpleproxy — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — simpleproxy — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-1857 Upstream summary: Format string vulnerability in simpleproxy before 3.4 allows remote malicious HTTP proxies to execute arbitrary code via format string specifiers in a reply. Table of […]

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Debian 11 — mate-screensaver — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — mate-screensaver — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-20681 Upstream summary: mate-screensaver before 1.20.2 in MATE Desktop Environment allows physically proximate attackers to view screen content and possibly control applications. By unplugging and re-plugging or power-cycling […]

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Debian 11 — libplist — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libplist — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 31 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-5209 CVE-2017-5545 CVE-2017-5834 CVE-2017-5835 CVE-2017-5836 CVE-2017-6435 CVE-2017-6436 CVE-2017-6437  +4 more Upstream summary: The base64decode function in base64.c in libimobiledevice libplist through 1.12 allows attackers to obtain sensitive information […]

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Debian 11 — sharutils — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — sharutils — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 31 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-1772 CVE-2004-1773 CVE-2005-0990 CVE-2018-1000097 Upstream summary: Stack-based buffer overflow in shar in GNU sharutils 4.2.1 allows local users to execute arbitrary code via a long -o command line […]

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Gentoo Linux — dev-ruby/rails — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-ruby/rails — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202408-24 Related CVEs: CVE-2022-32224 Upstream summary: Multiple vulnerabilities have been discovered in Ruby on Rails. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & […]

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Debian 11 — didiwiki — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — didiwiki — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-7448 Upstream summary: Directory traversal vulnerability in wiki.c in didiwiki allows remote attackers to read arbitrary files via the page parameter to api/page/get. Table of contents Symptom & […]

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