Security Hardening

Debian 13 — libcgi-session-perl — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libcgi-session-perl — multiple vulnerabilities (2 CVEs) — 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-2006-1279 CVE-2006-1280 Upstream summary: CGI::Session 4.03-1 allows local users to overwrite arbitrary files via a symlink attack on temporary files used by (1) Driver::File, (2) Driver::db_file, and possibly […]

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Debian 12 — sup-mail — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — sup-mail — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-4478 CVE-2013-4479 Upstream summary: Sup before 0.13.2.1 and 0.14.x before 0.14.1.1 allows remote attackers to execute arbitrary commands via shell metacharacters in the filename of an email attachment. […]

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Debian 9 — policykit-1 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — policykit-1 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-19788 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 12 — poetry-core — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — poetry-core — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-36069 Upstream summary: Poetry is a dependency manager for Python. When handling dependencies that come from a Git repository instead of a registry, Poetry uses various commands, such […]

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

Debian 11 — opencolorio — 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-2025-15506 Upstream summary: A vulnerability was found in AcademySoftwareFoundation OpenColorIO up to 2.5.0. This issue affects the function ConvertToRegularExpression of the file src/OpenColorIO/FileRules.cpp. Performing a manipulation results in […]

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Debian 11 — cherrypy3 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — cherrypy3 — 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-2008-0252 Upstream summary: Directory traversal vulnerability in the _get_file_path function in (1) lib/sessions.py in CherryPy 3.0.x up to 3.0.2, (2) filter/sessionfilter.py in CherryPy 2.1, and (3) filter/sessionfilter.py in […]

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Debian 12 — phpunit — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — phpunit — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-9841 CVE-2026-24765 CVE-2026-41570 Upstream summary: Util/PHP/eval-stdin.php in PHPUnit before 4.8.28 and 5.x before 5.6.3 allows remote attackers to execute arbitrary PHP code via HTTP POST data beginning with […]

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Debian 12 — uglify-js — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — uglify-js — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-37598 Upstream summary: Prototype pollution vulnerability in function DEFNODE in ast.js in mishoo UglifyJS 3.13.2 via the name variable in ast.js. NOTE: the vendor considers this an invalid […]

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Debian 12 — gnome-font-viewer — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — gnome-font-viewer — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-19308 Upstream summary: In text_to_glyphs in sushi-font-widget.c in gnome-font-viewer 3.34.0, there is a NULL pointer dereference while parsing a TTF font file that lacks a name section (due […]

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Debian 12 — openjpa — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — openjpa — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-1768 Upstream summary: The BrokerFactory functionality in Apache OpenJPA 1.x before 1.2.3 and 2.x before 2.2.2 creates local executable JSP files containing logging trace data produced during deserialization […]

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