CVE-2017-5866 Explained : Impact and Mitigation

A vulnerability in ownCloud Server versions prior to 8.1.11, 8.2.x prior to 8.2.9, 9.0.x prior to 9.0.7, and 9.1.x prior to 9.1.3 could allow remote authenticated users to access sensitive information through unspecified vectors.

Understanding CVE-2017-5866

This CVE entry describes a security issue in ownCloud Server that could lead to the exposure of confidential data.

What is CVE-2017-5866?

The vulnerability in the E-Mail sharing dialog of ownCloud Server versions allows remote authenticated users to obtain sensitive information due to an issue with the autocomplete feature.

The Impact of CVE-2017-5866

The vulnerability could result in unauthorized access to sensitive data by authenticated users, potentially leading to data breaches and privacy violations.

Technical Details of CVE-2017-5866

This section provides more technical insights into the vulnerability.

Vulnerability Description

The autocomplete feature in the E-Mail share dialog of affected ownCloud Server versions enables remote authenticated users to retrieve sensitive information through unspecified methods.

Affected Systems and Versions

ownCloud Server versions prior to 8.1.11
ownCloud Server 8.2.x before 8.2.9
ownCloud Server 9.0.x before 9.0.7
ownCloud Server 9.1.x before 9.1.3

Exploitation Mechanism

The vulnerability can be exploited by remote authenticated users leveraging the autocomplete feature in the E-Mail sharing dialog.

Mitigation and Prevention

Protecting systems from CVE-2017-5866 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update ownCloud Server to versions 8.1.11, 8.2.9, 9.0.7, or 9.1.3 to mitigate the vulnerability.
Monitor user activities and access to detect any unauthorized attempts.

Long-Term Security Practices

Regularly review and update security configurations and access controls.
Educate users on secure data sharing practices and the importance of confidentiality.

Patching and Updates

Apply security patches and updates provided by ownCloud promptly to address known vulnerabilities.