CVE-2017-2654 : Exploit Details and Defense Strategies

Jenkins-email-ext version 2.57.1 contains a security vulnerability that exposes information to unauthorized users. This CVE was published on March 20, 2017, with a CVSS base score of 3.7.

Understanding CVE-2017-2654

This CVE affects the Jenkins-email-ext plugin, allowing the sending of emails to users not registered in Jenkins, potentially exposing sensitive information.

What is CVE-2017-2654?

The vulnerability in jenkins-email-ext before version 2.57.1 enables the sending of emails to individuals without Jenkins accounts, including those not involved in the project, due to email address mappings.

The Impact of CVE-2017-2654

CVSS Base Score: 3.7 (Low Severity)
Attack Vector: Network
Attack Complexity: High
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: None
User Interaction: None
Scope: Unchanged
Vector String: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Technical Details of CVE-2017-2654

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows the Email Extension Plugins feature to send emails to a dynamically created user list based on changelogs, potentially reaching unintended recipients.

Affected Systems and Versions

Affected Product: jenkins-email-ext
Affected Version: 2.57.1

Exploitation Mechanism

Unauthorized users can exploit this vulnerability by manipulating email address mappings to receive emails intended for project stakeholders.

Mitigation and Prevention

Protect your systems from CVE-2017-2654 with the following steps:

Immediate Steps to Take

Update Jenkins-email-ext to version 2.57.1 or later.
Restrict email access to authorized users only.

Long-Term Security Practices

Regularly review and update email security policies.
Conduct security training for users on email best practices.

Patching and Updates

Apply patches and updates provided by Jenkins to address this vulnerability.