Security Hardening

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

Debian 13 — libmailtools-perl — 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-2002-1271 Upstream summary: The Mail::Mailer Perl module in the perl-MailTools package 1.47 and earlier uses mailx as the default mailer, which allows remote attackers to execute arbitrary commands […]

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Debian 11 — libssh — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libssh — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-4559 CVE-2012-4560 CVE-2012-4561 CVE-2012-4562 CVE-2012-6063 CVE-2013-0176 CVE-2014-0017 CVE-2014-8132  +12 more Upstream summary: Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request function in channels.c, […]

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Debian 13 — lua-cgi — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — lua-cgi — 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-2014-2875 Upstream summary: The session.lua library in CGILua 5.2 alpha 1 and 5.2 alpha 2 uses weak session IDs generated based on OS time, which allows remote attackers […]

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

Debian 12 — gummi — 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-2015-7758 Upstream summary: Gummi 0.6.5 allows local users to write to arbitrary files via a symlink attack on a temporary dot file that uses the name of an […]

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

Debian 12 — ognl — 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-2025-53192 Upstream summary: ** UNSUPPORTED WHEN ASSIGNED ** Improper Neutralization of Expression/Command Delimiters vulnerability in Apache Commons OGNL. This issue affects Apache Commons OGNL: all versions. When using […]

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

Debian 13 — node-prismjs — multiple vulnerabilities (5 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-2020-15138 CVE-2021-23341 CVE-2021-3801 CVE-2022-23647 CVE-2024-53382 Upstream summary: Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to […]

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

Debian 13 — octavia — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-17134 Upstream summary: Amphora Images in OpenStack Octavia >=0.10.0 <2.1.2, >=3.0.0 <3.2.0, >=4.0.0 <4.1.0 allows anyone with access to the management network to bypass client-certificate based authentication and retrieve […]

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Debian 11 — pax — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — pax — multiple vulnerabilities (2 CVEs) — 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-2015-1193 CVE-2015-1194 Upstream summary: Multiple directory traversal vulnerabilities in pax 1:20140703 allow remote attackers to write to arbitrary files via a (1) full pathname or (2) .. (dot […]

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

Debian 11 — opt — 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-2003-0390 Upstream summary: Multiple buffer overflows in Options Parsing Tool (OPT) shared library 3.18 and earlier, when used in setuid programs, may allow local users to execute arbitrary […]

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

Debian 13 — sketch — 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-2002-2047 Upstream summary: The file preview functionality in Sketch 0.6.12 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in the filename of an encapsulated […]

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