Security Hardening

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

Debian 11 — kcron — 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-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 — libuser — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libuser — 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-2011-0002 CVE-2012-5630 CVE-2012-5644 CVE-2015-3245 CVE-2015-3246 Upstream summary: libuser before 0.57 uses a cleartext password value of (1) !! or (2) x for new LDAP user accounts, which makes […]

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Debian 13 — hylafax — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — hylafax — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2001-1034 CVE-2002-1049 CVE-2002-1050 CVE-2003-0886 CVE-2004-1182 CVE-2005-3069 CVE-2005-3070 CVE-2005-3538  +3 more Upstream summary: Format string vulnerability in Hylafax on FreeBSD allows local users to execute arbitrary code via format […]

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Debian 13 — syncthing — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — syncthing — 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-2017-1000420 CVE-2021-21404 CVE-2022-46165 Upstream summary: Syncthing version 0.14.33 and older is vulnerable to symlink traversal resulting in arbitrary file overwrite Table of contents Symptom & Impact Environment & […]

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

Debian 13 — libzip — 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-2011-0421 CVE-2012-1162 CVE-2012-1163 CVE-2015-2331 CVE-2017-14107 Upstream summary: The _zip_name_locate function in zip_name_locate.c in the Zip extension in PHP before 5.3.6 does not properly handle a ZIPARCHIVE::FL_UNCHANGED argument, which […]

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Debian 12 — golang-github-google-nftables — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — golang-github-google-nftables — 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-2024-6284 Upstream summary: In https://github.com/google/nftables  IP addresses were encoded in the wrong byte order, resulting in an nftables configuration which does not work as intended (might block or not […]

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Debian 12 — python-keystoneclient — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — python-keystoneclient — multiple vulnerabilities (7 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-2013-2013 CVE-2013-2104 CVE-2013-2166 CVE-2013-2167 CVE-2014-0105 CVE-2014-7144 CVE-2015-1852 Upstream summary: The user-password-update command in python-keystoneclient before 0.2.4 accepts the new password in the –password argument, which allows local users […]

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Debian 12 — python-requests-kerberos — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — python-requests-kerberos — 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-2014-8650 Upstream summary: python-requests-Kerberos through 0.5 does not handle mutual authentication Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution […]

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

Debian 12 — pycsw — 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-2016-8640 Upstream summary: A SQL injection vulnerability in pycsw all versions before 2.0.2, 1.10.5 and 1.8.6 that leads to read and extract of any data from any table […]

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