Security Hardening

Debian 9 — undertow — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — undertow — 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-2017-2666 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 — imapfilter — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — imapfilter — 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-2016-10937 Upstream summary: IMAPFilter through 2.6.12 does not validate the hostname in an SSL certificate. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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

Debian 13 — maildirsync — 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-2008-5150 Upstream summary: sample.sh in maildirsync 1.1 allows local users to append data to arbitrary files via a symlink attack on a /tmp/maildirsync-*.#####.log temporary file. Table of contents […]

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Debian 12 — libdata-formvalidator-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libdata-formvalidator-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-2011-2201 Upstream summary: The Data::FormValidator module 4.66 and earlier for Perl, when untaint_all_constraints is enabled, does not properly preserve the taint attribute of data, which might allow remote […]

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Debian 13 — fcitx5 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — fcitx5 — 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-2021-37311 Upstream summary: Buffer Overflow vulnerability in fcitx5 5.0.8 allows attackers to cause a denial of service via crafted message to the application's listening port. Table of contents Symptom […]

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

Debian 11 — slurm-wlm — 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-2021-31215 CVE-2022-29500 CVE-2022-29501 CVE-2023-41914 CVE-2023-49933 CVE-2023-49936 CVE-2023-49937 CVE-2023-49938  +1 more Upstream summary: SchedMD Slurm before 20.02.7 and 20.03.x through 20.11.x before 20.11.7 allows remote code execution as SlurmUser […]

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

Debian 13 — muttprint — 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-2008-5368 Upstream summary: muttprint in muttprint 0.72d allows local users to overwrite arbitrary files via a symlink attack on the /tmp/muttprint.log temporary file. Table of contents Symptom & […]

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Debian 12 — nvidia-cuda-toolkit — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — nvidia-cuda-toolkit — multiple vulnerabilities (20 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-2020-5991 CVE-2022-21821 CVE-2022-34667 CVE-2023-0193 CVE-2023-0196 CVE-2023-25510 CVE-2023-25511 CVE-2023-25512  +12 more Upstream summary: NVIDIA CUDA Toolkit, all versions prior to 11.1.1, contains a vulnerability in the NVJPEG library in […]

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Debian 13 — xshisen — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — xshisen — 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-2003-1053 CVE-2005-0117 Upstream summary: Multiple buffer overflows in XShisen allow attackers to execute arbitrary code via a long (1) -KCONV command line option or (2) XSHISENLIB environment variable. […]

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Debian 11 — cyrus-sasl2 — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — cyrus-sasl2 — multiple vulnerabilities (8 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-2002-1347 CVE-2004-0884 CVE-2005-0373 CVE-2006-1721 CVE-2009-0688 CVE-2013-4122 CVE-2019-19906 CVE-2022-24407 Upstream summary: Multiple buffer overflows in Cyrus SASL library 2.1.9 and earlier allow remote attackers to cause a denial of […]

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