Security Hardening

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2006-0459 CVE-2010-0634 CVE-2016-6354 CVE-2019-6293 Upstream summary: flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing […]

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Debian 10 — httpcomponents-client — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — httpcomponents-client — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-13956 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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Debian 13 — wget2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — wget2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-69194 CVE-2025-69195 CVE-2026-1858 Upstream summary: A security issue was discovered in GNU Wget2 when handling Metalink documents. The application fails to properly validate file paths provided in Metalink […]

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Debian 10 — neomutt — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — neomutt — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-14093 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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Debian 13 — xml-security-c — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — xml-security-c — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-0217 CVE-2011-2516 CVE-2013-2153 CVE-2013-2154 CVE-2013-2155 CVE-2013-2156 CVE-2013-2210 Upstream summary: The design of the W3C XML Signature Syntax and Processing (XMLDsig) recommendation, as implemented in products including (1) the […]

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Debian 11 — munin — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — munin — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-2103 CVE-2012-2104 CVE-2012-2147 CVE-2012-3512 CVE-2012-3513 CVE-2012-4678 CVE-2013-6048 CVE-2013-6359  +1 more Upstream summary: The qmailscan plugin for Munin 1.4.5 allows local users to overwrite arbitrary files via a symlink […]

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Debian 12 — xscreensaver — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — xscreensaver — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0885 CVE-2003-1294 CVE-2003-1295 CVE-2004-2655 CVE-2007-1859 CVE-2007-5585 CVE-2011-2187 CVE-2015-8025  +2 more Upstream summary: Xscreensaver 4.14 contains certain debugging code that should have been omitted, which causes Xscreensaver to create […]

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Debian 13 — tintin++ — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — tintin++ — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-0671 CVE-2008-0672 CVE-2008-0673 CVE-2019-7629 Upstream summary: Stack-based buffer overflow in the add_line_buffer function in TinTin++ 1.97.9 and WinTin++ 1.97.9 allows remote attackers to execute arbitrary code via a […]

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

Debian 13 — aview — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-4935 Upstream summary: asciiview in aview 1.3.0 allows local users to overwrite arbitrary files via a symlink attack on a /tmp/aview#####.pgm temporary file. Table of contents Symptom & […]

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Debian 11 — libconvert-uulib-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libconvert-uulib-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-1349 Upstream summary: Buffer overflow in Convert-UUlib (Convert::UUlib) before 1.051 allows remote attackers to execute arbitrary code via a malformed parameter to a read operation. Table of contents […]

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