Linux

Ubuntu 22.04 — python-os-brick — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — python-os-brick — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 February 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6241-1 Related CVEs: CVE-2023-2088 https://launchpad.net/bugs/2020111 Upstream summary: Jan Wasilewski and Gorka Eguileor discovered that OpenStack incorrectly handled deleted volume attachments. An authenticated user or attacker could possibly use this issue […]

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Oracle Linux 8 — openssl — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — openssl — vulnerability — patch and remediation guide (ELSA-2022-1065)

🟠 High   ⏱ 15–60 min  Last verified: 8 February 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1065 Related CVEs: CVE-2022-0778 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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CentOS Stream 9 — kernel-rt — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — kernel-rt — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 February 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2023:5091 Related CVEs: CVE-2023-1637 CVE-2023-20593 CVE-2023-21102 CVE-2023-31248 CVE-2023-3390 CVE-2023-35001 CVE-2023-3610 CVE-2023-3776  +12 more Upstream summary: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely […]

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Debian 10 — nss — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — nss — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 February 2023 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-11745 CVE-2019-17006 CVE-2021-43527 CVE-2022-22747 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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Debian 11 — intel-microcode — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — intel-microcode — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 February 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-5715 CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2018-3615 CVE-2018-3620 CVE-2018-3639 CVE-2018-3640  +12 more Upstream summary: Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information […]

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Amazon Linux 2 — ncurses — multiple vulnerabilities (18 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — ncurses — multiple vulnerabilities (18 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2096 Related CVEs: CVE-2023-29491 CVE-2023-45918 CVE-2023-50495 CVE-2019-17594 CVE-2019-17595 CVE-2020-19185 CVE-2020-19186 CVE-2020-19187  +10 more Upstream summary: ncurses before 6.4 20230408, when used by a setuid application, allows local users to trigger […]

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Debian 11 — libnetwork-ipv4addr-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libnetwork-ipv4addr-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 February 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-47155 Upstream summary: The Net::IPV4Addr module 0.10 for Perl does not properly consider extraneous zero characters in an IP address string, which (in some situations) allows attackers to […]

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Debian 11 — shim — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — shim — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 February 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-28737 CVE-2023-40546 CVE-2023-40547 CVE-2023-40548 CVE-2023-40549 CVE-2023-40550 CVE-2023-40551 Upstream summary: There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function […]

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

Debian 11 — gssproxy — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 February 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-12658 Upstream summary: gssproxy (aka gss-proxy) before 0.8.3 does not unlock cond_mutex before pthread exit in gp_worker_main() in gp_workers.c. NOTE: An upstream comment states "We are already on […]

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

Debian 11 — backupninja — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 February 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-3111 Upstream summary: The handler code for backupninja 0.8 and earlier creates temporary files with predictable filenames, which allows local users to modify arbitrary files via a symlink […]

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