CVE-2022-24725 : What You Need to Know

Shescape is a shell escape package for JavaScript. An issue in versions 1.4.0 to 1.5.1 allows for exposure of the home directory on Unix systems when using Bash with the

escape

or

escapeAll

functions from the shescape API with the

interpolation

option set to

true

. Other tested shells, Dash and Zsh, are not affected. Depending on how the output of shescape is used, directory traversal may be possible in the application using shescape. The issue was patched in version 1.5.1. As a workaround, manually escape all instances of the tilde character (

~

) using

arg.replace(/~/g, "\\~")

.

Understanding CVE-2022-24725

This section will provide detailed insights into the exposure of the home directory through the shescape package on Unix systems with Bash.

What is CVE-2022-24725?

CVE-2022-24725, also known as "Exposure of home directory through shescape on Unix with Bash," is a vulnerability in the shescape package versions 1.4.0 to 1.5.1 that allows the exposure of the home directory on Unix systems when certain functions are used with specific options.

The Impact of CVE-2022-24725

The impact of this vulnerability is considered medium with a CVSS base score of 6.2. It has a high confidentiality impact, low attack complexity, and requires no special privileges for exploitation. The issue was patched in version 1.5.1.

Technical Details of CVE-2022-24725

This section will delve into the technical aspects of the vulnerability including its description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows for the exposure of the home directory on Unix systems when using Bash with specific functions from the shescape API.

Affected Systems and Versions

Versions 1.4.0 to 1.5.1 of the shescape package are affected by this vulnerability.

Exploitation Mechanism

By using the

escape

or

escapeAll

functions from the shescape package with the

interpolation

option set to

true

, the home directory on Unix systems can be exposed.

Mitigation and Prevention

This section will outline the steps to mitigate and prevent the exploitation of CVE-2022-24725.

Immediate Steps to Take

Update to version 1.5.1 of the shescape package to patch the vulnerability.
As a workaround, manually escape all instances of the tilde character (

~

) using

arg.replace(/~/g, "\\~")

.

Long-Term Security Practices

Regularly update the shescape package to the latest version to avoid known vulnerabilities.
Review and sanitize the output of shescape to prevent directory traversal.

Patching and Updates

Stay informed about security advisories and patches released by the package maintainers to address any newly discovered vulnerabilities.