CVE-2017-7983 : Security Advisory and Response

Joomla! versions 1.5.0 to 3.6.5 had a vulnerability in the JMail API that exposed the PHPMailer version in mail headers. This issue was resolved in version 3.7.0.

Understanding CVE-2017-7983

From Joomla! version 1.5.0 to 3.6.5, a vulnerability in the JMail API exposed the PHPMailer version in mail headers, fixed in version 3.7.0.

What is CVE-2017-7983?

This CVE refers to a security vulnerability in Joomla! versions 1.5.0 to 3.6.5 that allowed the PHPMailer version to be leaked in mail headers.

The Impact of CVE-2017-7983

The exposure of the PHPMailer version in mail headers could potentially aid attackers in crafting targeted exploits against affected systems.

Technical Details of CVE-2017-7983

Joomla! versions 1.5.0 to 3.6.5 were affected by a vulnerability in the JMail API.

Vulnerability Description

The vulnerability allowed the PHPMailer version to be exposed in mail headers, potentially aiding attackers in crafting exploits.

Affected Systems and Versions

Affected Systems: Joomla! versions 1.5.0 to 3.6.5
Unaffected Systems: Versions after 3.7.0

Exploitation Mechanism

Attackers could exploit this vulnerability by leveraging the exposed PHPMailer version in mail headers to target vulnerable systems.

Mitigation and Prevention

To address CVE-2017-7983, users should take immediate steps and adopt long-term security practices.

Immediate Steps to Take

Update Joomla! to version 3.7.0 or later to mitigate the vulnerability.
Monitor for any suspicious activities related to mail headers.

Long-Term Security Practices

Regularly update Joomla! and all its components to the latest versions.
Implement email security best practices to prevent information disclosure vulnerabilities.

Patching and Updates

Apply patches provided by Joomla! promptly to address security vulnerabilities and prevent exploitation.