Security Hardening

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

Debian 11 — gnumail — 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-2007-1269 Upstream summary: GNUMail 1.1.2 and earlier does not properly use the –status-fd argument when invoking GnuPG, which prevents GNUMail from visually distinguishing between signed and unsigned portions […]

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Debian 12 — node-fstream — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — node-fstream — 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-2019-13173 Upstream summary: fstream before 1.0.12 is vulnerable to Arbitrary File Overwrite. Extracting tarballs containing a hardlink to a file that already exists in the system, and a […]

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Debian 13 — qt6-connectivity — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — qt6-connectivity — 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-2025-23050 Upstream summary: QLowEnergyController in Qt before 6.8.2 mishandles malformed Bluetooth ATT commands, leading to an out-of-bounds read (or division by zero). This is fixed in 5.15.19, 6.5.9, and […]

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Debian 11 — exfat-utils — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — exfat-utils — 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-2015-8026 Upstream summary: Heap-based buffer overflow in the verify_vbr_checksum function in exfatfsck in exfat-utils before 1.2.1 allows remote attackers to cause a denial of service (infinite loop) or […]

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Debian 13 — ruby-secure-headers — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — ruby-secure-headers — 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-2020-5216 CVE-2020-5217 Upstream summary: In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.9.0, 5.2.0, and 6.3.0. If user-supplied input was passed into […]

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

Debian 12 — gnuchess — 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-2015-8972 CVE-2019-15767 CVE-2021-30184 Upstream summary: Stack-based buffer overflow in the ValidateMove function in frontend/move.cc in GNU Chess (aka gnuchess) before 6.2.4 might allow context-dependent attackers to execute arbitrary […]

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

Debian 12 — kcron — 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-2022-24986 Upstream summary: KDE KCron through 21.12.2 uses a temporary file in /tmp when saving, but reuses the filename during an editing session. Thus, someone watching it be […]

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

Debian 13 — liboping — 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-2009-3614 Upstream summary: liboping 1.3.2 allows users reading arbitrary files upon the local system. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Debian 12 — libconfig-inifiles-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libconfig-inifiles-perl — 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-2012-2451 Upstream summary: The Config::IniFiles module before 2.71 for Perl creates temporary files with predictable names, which allows local users to overwrite arbitrary files via a symlink attack. […]

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

Debian 12 — partclone — 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-2016-10721 CVE-2016-10722 CVE-2017-6596 Upstream summary: partclone.restore in Partclone 0.2.87 is prone to a heap-based buffer overflow vulnerability due to insufficient validation of the partclone image header. An attacker […]

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