CVE-2020-7615: OS Command Injection in fsa
Summary
CVE-2020-7615: OS Command Injection in fsa. Affects fsa versions < 0.5.1. No fix is published. How to fix ↓
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Background
The fsa package is an npm package that provides functionality for executing Git commands. It is used to interact with Git repositories and perform various operations. However, versions up to 0.5.1 of fsa are vulnerable to OS Command Injection. This vulnerability exists in the 'execGitCommand()' function located within 'lib/rep.js#63'. The first argument of this function can be controlled by users without any sanitization, allowing them to inject arbitrary commands.
Vulnerability Detail
The OS Command Injection vulnerability in fsa allows attackers to execute arbitrary commands on the host system. By manipulating the first argument of the 'execGitCommand()' function, an attacker can inject malicious commands that will be executed with the privileges of the user running the vulnerable application. This can lead to unauthorized access, data leakage, or even complete compromise of the affected system. The vulnerability has a CVSS score of 7.8, indicating a high severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, developers can implement input validation and sanitization to prevent user-controlled input from being passed to the vulnerable function. By validating and sanitizing the first argument of the 'execGitCommand()' function, developers can ensure that only safe and expected values are used. Here's an example of how input validation can be implemented in JavaScript:
function validateInput(input) {
// Perform input validation and sanitization
// Return sanitized input
}
const safeInput = validateInput(userInput);
execGitCommand(safeInput, ...);
Conclusion
The OS Command Injection vulnerability in fsa can lead to serious security risks, allowing attackers to execute arbitrary commands on the host system. It is crucial for developers to upgrade to a non-vulnerable version of fsa and implement proper input validation and sanitization to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
fsa is an npm package used for executing Git commands and interacting with Git repositories.
OS Command Injection is a vulnerability that allows attackers to execute arbitrary commands on the host system by injecting malicious input into a command execution function.
This vulnerability can be exploited by manipulating the first argument of the 'execGitCommand()' function in fsa, allowing an attacker to inject arbitrary commands that will be executed with the privileges of the user running the vulnerable application.
The potential consequences of this vulnerability include unauthorized access to sensitive information, data leakage, and complete compromise of the affected system.
To fix this vulnerability, it is recommended to upgrade fsa to a version that is not affected by the issue and implement input validation and sanitization to prevent command injection attacks.
