Operations

Debian 11 — libnet-dns-perl — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libnet-dns-perl — multiple vulnerabilities (4 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-2007-3377 CVE-2007-3409 CVE-2007-6341 CVE-2008-1447 Upstream summary: Header.pm in Net::DNS before 0.60, a Perl module, (1) generates predictable sequence IDs with a fixed increment and (2) can use the […]

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

Debian 11 — opensmtpd — 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-2013-2125 CVE-2015-7687 CVE-2020-35679 CVE-2020-35680 CVE-2020-7247 CVE-2020-8793 CVE-2020-8794 CVE-2023-29323  +1 more Upstream summary: OpenSMTPD before 5.3.2 does not properly handle SSL sessions, which allows remote attackers to cause a […]

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Debian 11 — jline3 — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — jline3 — 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-2023-50572 Upstream summary: An issue in the component GroovyEngine.execute of jline-groovy v3.24.1 allows attackers to cause an OOM (OutofMemory) error. Table of contents Symptom & Impact Environment & […]

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Debian 10 — moin — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — moin — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-15275 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 — jupyterhub — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — jupyterhub — multiple vulnerabilities (6 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-2020-36191 CVE-2021-41247 CVE-2024-28233 CVE-2024-41942 CVE-2026-33709 CVE-2026-40864 Upstream summary: JupyterHub 1.1.0 allows CSRF in the admin panel via a request that lacks an _xsrf field, as demonstrated by a […]

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Debian 13 — dpkg-cross — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — dpkg-cross — 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-2008-4950 Upstream summary: gccross in dpkg-cross 2.3.0 allows local users to overwrite arbitrary files via a symlink attack on the tmp/gccross2.log temporary file. NOTE: the vendor disputes this […]

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

Debian 12 — grub — 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-2008-3896 CVE-2023-4949 Upstream summary: Grub Legacy 0.97 and earlier stores pre-boot authentication passwords in the BIOS Keyboard buffer and does not clear this buffer before and after use, […]

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Debian 13 — taglib — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — taglib — multiple vulnerabilities (7 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-2012-1107 CVE-2012-1108 CVE-2012-1584 CVE-2012-2396 CVE-2017-12678 CVE-2018-11439 CVE-2023-47466 Upstream summary: The analyzeCurrent function in ape/apeproperties.cpp in TagLib 1.7 and earlier allows context-dependent attackers to cause a denial of service […]

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Debian 10 — net-snmp — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — net-snmp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-15861 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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