CVE-2020-7789 in node-notifier
Summary
by MITRE • 12/11/2020
This affects the package node-notifier before 9.0.0. It allows an attacker to run arbitrary commands on Linux machines due to the options params not being sanitised when being passed an array.
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Analysis
by VulDB Data Team • 06/27/2025
The vulnerability identified as CVE-2020-7789 resides within the node-notifier package, a popular Node.js library used for generating desktop notifications across different operating systems. This security flaw affects versions prior to 9.0.0 and represents a critical command injection vulnerability that specifically targets Linux environments. The issue stems from insufficient input validation within the package's handling of notification options parameters, creating a pathway for malicious actors to execute arbitrary commands on affected systems.
The technical flaw manifests when the node-notifier package processes notification options that are passed as arrays rather than individual parameters. This occurs because the library fails to properly sanitize or validate user-provided input before incorporating it into system commands. When an attacker supplies an array of options, the application does not adequately separate or escape these values, allowing malicious payloads to be interpreted as command-line arguments. This vulnerability directly maps to CWE-78, which describes improper neutralization of special elements in OS command, and represents a classic command injection attack vector that has been extensively documented in cybersecurity literature.
The operational impact of CVE-2020-7789 extends beyond simple privilege escalation, as it can enable full system compromise when exploited. An attacker with the ability to influence notification options can execute arbitrary commands with the privileges of the process running node-notifier, potentially leading to complete system takeover. This vulnerability is particularly concerning in environments where applications using node-notifier might receive untrusted input from users or external sources, such as web applications, automated systems, or services that generate notifications based on user-provided data. The attack surface is broad as node-notifier is widely used across numerous Node.js applications and frameworks, making this vulnerability potentially exploitable in many different contexts.
Mitigation strategies for CVE-2020-7789 primarily focus on immediate version upgrades to node-notifier 9.0.0 or later, which contains the necessary input sanitization fixes. Organizations should conduct comprehensive vulnerability assessments to identify all systems using affected versions of the package and prioritize remediation efforts. Additionally, implementing proper input validation at application layers that utilize node-notifier can provide additional defense-in-depth measures. Security teams should also consider monitoring for suspicious notification-related system calls and implementing network segmentation to limit potential lateral movement if exploitation occurs. The vulnerability demonstrates the importance of proper input validation and parameter sanitization in preventing command injection attacks, aligning with ATT&CK technique T1059.001 for command and script injection, and emphasizes the critical need for maintaining up-to-date dependencies in software supply chains.