CVE-2020-2253 : Security Advisory and Response

Jenkins Email Extension Plugin 2.75 and earlier versions have a vulnerability that allows connections to SMTP servers without proper hostname validation.

Understanding CVE-2020-2253

This CVE affects the Jenkins Email Extension Plugin, potentially exposing systems to security risks.

What is CVE-2020-2253?

This CVE identifies a lack of hostname validation in Jenkins Email Extension Plugin versions 2.75 and earlier when connecting to SMTP servers, leaving systems vulnerable to attacks.

The Impact of CVE-2020-2253

The vulnerability could be exploited by malicious actors to intercept or manipulate email communications, leading to potential data breaches or unauthorized access.

Technical Details of CVE-2020-2253

The technical aspects of this CVE provide insights into the vulnerability and its implications.

Vulnerability Description

Jenkins Email Extension Plugin versions 2.75 and earlier lack hostname validation, allowing connections to SMTP servers without proper verification.

Affected Systems and Versions

Product: Jenkins Email Extension Plugin
Vendor: Jenkins project
Affected Versions: <= 2.75 (unspecified custom version)

Exploitation Mechanism

The vulnerability can be exploited by attackers to intercept or manipulate email traffic by exploiting the lack of hostname validation in the plugin.

Mitigation and Prevention

Protecting systems from CVE-2020-2253 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Jenkins Email Extension Plugin to a secure version that includes hostname validation.
Monitor email communications for any suspicious activities.

Long-Term Security Practices

Regularly update all plugins and software to the latest secure versions.
Implement network monitoring and intrusion detection systems to detect unusual email traffic patterns.

Patching and Updates

Apply patches provided by Jenkins project to address the vulnerability.