CVE-2017-8418 : Security Advisory and Response

RuboCop 0.48.1 and earlier versions have a vulnerability that allows local users to manipulate cache files in an unsafe manner.

Understanding CVE-2017-8418

RuboCop versions 0.48.1 and earlier are susceptible to a security issue that can be exploited by local users.

What is CVE-2017-8418?

The vulnerability in RuboCop versions 0.48.1 and earlier arises from the unsafe utilization of /tmp, enabling local users to maliciously tamper with cache files belonging to other users.

The Impact of CVE-2017-8418

This vulnerability allows local users to manipulate cache files of other users, potentially leading to unauthorized access and data compromise.

Technical Details of CVE-2017-8418

RuboCop 0.48.1 and earlier versions have a security flaw related to the handling of /tmp directory.

Vulnerability Description

RuboCop versions 0.48.1 and earlier do not securely use the /tmp directory, allowing local users to exploit this weakness to tamper with cache files of other users.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: RuboCop 0.48.1 and earlier

Exploitation Mechanism

The vulnerability can be exploited by local users to manipulate cache files that do not belong to them, potentially compromising the integrity and confidentiality of data.

Mitigation and Prevention

To address CVE-2017-8418, follow these steps:

Immediate Steps to Take

Update RuboCop to a patched version that addresses the /tmp directory vulnerability.
Regularly monitor and audit file permissions and access controls in the /tmp directory.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access to sensitive directories.
Conduct regular security training for users to raise awareness about safe file handling practices.

Patching and Updates

Apply security patches provided by RuboCop promptly to mitigate the vulnerability and enhance system security.