TLDR: Misconfigured bash script permissions occur when access rights or execution settings for shell scripts are improperly set, leading to risks such as unauthorized modifications, execution of malicious code, or unintended privilege escalation. Common issues include overly permissive permissions, lack of ownership control, and improper usage of `setuid` or `setgid` attributes. Proper configuration ensures secure and controlled execution of bash scripts in any environment.
https://en.wikipedia.org/wiki/Bash_(Unix_shell)
A misconfigured bash script might involve assigning `777` permissions (full read, write, and execute access) to all users, enabling unauthorized modifications or execution of sensitive scripts. Failing to properly set the script owner or group can lead to execution by unintended users. Additionally, misusing `setuid` or `setgid` attributes can inadvertently grant elevated privileges to malicious or compromised scripts. Tools like `chmod`, `chown`, and `lsattr` help manage and audit script permissions.
https://man7.org/linux/man-pages/man1/chmod.1.html
To secure bash script permissions, administrators should follow the principle of least privilege by restricting access to authorized users only and assigning specific roles. Using `chmod 700` limits access to the script owner while maintaining security. Regular audits of script ownership and permissions, combined with logging and monitoring tools like auditd, ensure the secure execution and integrity of bash scripts across environments.