CVE-2023-31128 : Security Advisory and Response

NextCloud Cookbook's pull-checks.yml workflow is vulnerable to OS Command Injection.

Understanding CVE-2023-31128

NextCloud Cookbook, a recipe library app, was found to have a vulnerability prior to specific commits that could lead to OS Command Injection in the

pull-checks.yml

workflow.

What is CVE-2023-31128?

CVE-2023-31128 highlights an OS Command Injection vulnerability in the NextCloud Cookbook application due to the use of an untrusted

github.head_ref

field, allowing attackers to execute arbitrary commands.

The Impact of CVE-2023-31128

The vulnerability's impact is rated as HIGH due to the ability of an attacker to achieve high integrity and availability impacts on affected systems with low attack complexity.

Technical Details of CVE-2023-31128

The vulnerable versions of the NextCloud Cookbook are 'master < a46d9855' and 'main-0.9.x < 489bb744'. The vulnerability arises from an untrusted field in the workflow that allows command injection.

Vulnerability Description

Due to the untrusted

github.head_ref

field, attackers can inject commands leading to unauthorized actions on affected systems. The issue has been addressed in specific commits on the mentioned branches.

Affected Systems and Versions

Users with versions 'master < a46d9855' and 'main-0.9.x < 489bb744' of the NextCloud Cookbook are susceptible to this OS Command Injection vulnerability.

Exploitation Mechanism

Attackers can exploit the vulnerability by leveraging the untrusted

github.head_ref

field to execute malicious commands on affected systems.

Mitigation and Prevention

It is crucial for users to take immediate action to mitigate the risks associated with CVE-2023-31128.

Immediate Steps to Take

Users should ensure that their repositories are updated to the versions where the vulnerability has been patched. Regularly monitoring for security advisories and applying updates promptly is recommended.

Long-Term Security Practices

Implementing secure coding practices, restricting untrusted inputs, and conducting regular security audits can help prevent similar vulnerabilities in the future.

Patching and Updates

Users are advised to apply the necessary patches provided in the commits 'a46d9855' and '489bb744' to secure their systems against OS Command Injection attacks.