CVE-2017-16804 : Exploit Details and Defense Strategies

In prior versions of Redmine, a vulnerability existed that allowed remote authenticated users to access sensitive information through reminder messages sent via email.

Understanding CVE-2017-16804

In Redmine versions before 3.2.7 and 3.3.x before 3.3.4, a flaw in the reminders feature could be exploited by attackers.

What is CVE-2017-16804?

The vulnerability in Redmine's mailer.rb file allowed authenticated remote users to gain unauthorized access to sensitive data by reading reminder messages.

The Impact of CVE-2017-16804

The vulnerability could lead to unauthorized disclosure of sensitive information, potentially compromising the confidentiality of data stored in Redmine.

Technical Details of CVE-2017-16804

The technical aspects of the vulnerability are crucial to understanding its implications.

Vulnerability Description

The flaw in the reminders feature of Redmine's mailer.rb file allowed remote authenticated users to access sensitive information through email reminders.

Affected Systems and Versions

Redmine versions before 3.2.7
Redmine 3.3.x before 3.3.4

Exploitation Mechanism

Attackers with remote authenticated access could exploit the lack of visibility checks in the reminders feature to read sensitive information sent via email.

Mitigation and Prevention

Protecting systems from CVE-2017-16804 requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade Redmine to version 3.2.7 or 3.3.4 to mitigate the vulnerability.
Monitor and restrict access to sensitive information within Redmine.

Long-Term Security Practices

Regularly review and update security configurations in Redmine.
Educate users on the importance of data confidentiality and secure communication practices.

Patching and Updates

Apply security patches provided by Redmine to address the vulnerability and enhance system security.