Pensar - auto fix for Overly Permissive Output Directory Permissions in Docker Environment

[pensarapp]

Type	Identifier	Message	Severity	Link
Application	CWE-264, CWE-276	This Dockerfile command creates an output directory and sets its permissions to 777, granting full read, write, and execute rights to all users. In a containerized environment that hosts potentially sensitive operations, this overly permissive setting can allow unauthorized processes or users to modify or access the stored data. Given the file's central role in setting up the environment for code generation and execution, such a permission misconfiguration could be exploited in an attack that escalates privileges or allows unauthorized file manipulation. Although this might sometimes be seen as a practicality in container development, it represents a true positive vulnerability from a security standpoint.	medium	Link

The vulnerability in the original Dockerfile was the use of overly permissive 777 permissions for the /app/output directory (line 25). These permissions grant full read, write, and execute rights to all users, which could lead to unauthorized access, data manipulation, or privilege escalation.

The fix changes the permissions from 777 (rwxrwxrwx) to 755 (rwxr-xr-x), which restricts write access to only the owner of the directory while still allowing read and execute access for all users. This is a more secure configuration that prevents unauthorized users from making changes to the directory's contents while maintaining necessary functionality.

This modification addresses CWE-264 (Permissions, Privileges, and Access Controls) and CWE-276 (Incorrect Default Permissions) by implementing the principle of least privilege - granting only the permissions necessary for the application to function properly.

For even better security in a production environment, consider:

1. Running the application as a non-root user (by adding a USER instruction)
2. Setting appropriate ownership of the directory to that specific user
3. Further restricting permissions if the application doesn't require full read/execute access for all users

[restack-app]

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