Security Hardening

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

Debian 11 — fontconfig — 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-2016-5384 Upstream summary: fontconfig before 2.12.1 does not validate offsets, which allows local users to trigger arbitrary free calls and consequently conduct double free attacks and execute arbitrary […]

Read more
Debian 11 — dnsjava — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — dnsjava — multiple vulnerabilities (3 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-2023-50387 CVE-2023-50868 CVE-2024-25638 Upstream summary: Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial […]

Read more
Debian 11 — jsch — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — jsch — 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-2016-5725 Upstream summary: Directory traversal vulnerability in JCraft JSch before 0.1.54 on Windows, when the mode is ChannelSftp.OVERWRITE, allows remote SFTP servers to write to arbitrary files via […]

Read more
Debian 13 — pam-u2f — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — pam-u2f — multiple vulnerabilities (4 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-2019-12209 CVE-2019-12210 CVE-2021-31924 CVE-2025-23013 Upstream summary: Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify […]

Read more
Debian 12 — zhcon — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — zhcon — 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-2005-0072 Upstream summary: zhcon before 0.2 does not drop privileges before reading a user configuration file, which allows local users to read arbitrary files. Table of contents Symptom […]

Read more
Debian 13 — schism — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — schism — multiple vulnerabilities (4 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-2019-14465 CVE-2019-14523 CVE-2019-14524 CVE-2021-32419 Upstream summary: fmt_mtm_load_song in fmt/mtm.c in Schism Tracker 20190722 has a heap-based buffer overflow. Table of contents Symptom & Impact Environment & Reproduction Root […]

Read more
Debian 11 — fscrypt — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — fscrypt — 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-2018-6558 CVE-2022-25326 CVE-2022-25327 CVE-2022-25328 Upstream summary: The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root […]

Read more
Debian 13 — kildclient — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — kildclient — 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-2017-17511 Upstream summary: KildClient 3.1.0 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow remote attackers to conduct argument-injection attacks via […]

Read more
Debian 13 — ipython — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — ipython — multiple vulnerabilities (6 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-2014-3429 CVE-2015-4707 CVE-2015-5607 CVE-2015-6938 CVE-2018-8768 CVE-2022-21699 Upstream summary: IPython Notebook 0.12 through 1.x before 1.2 does not validate the origin of websocket requests, which allows remote attackers to […]

Read more
Debian 12 — python-rply — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — python-rply — 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-2014-1604 CVE-2014-1938 Upstream summary: The parser cache functionality in parsergenerator.py in RPLY (aka python-rply) before 0.7.1 allows local users to spoof cache data by pre-creating a temporary rply-*.json […]

Read more
CHAT