[org.jenkins-ci.plugins:ec2] Lack of SSL/TLS certificate and hostname validation in Amazon EC2 Plugin

Amazon EC2 Plugin connects to Windows agents via HTTPS.

Amazon EC2 Plugin 1.50.1 and earlier unconditionally accepts self-signed HTTPS certificates and does not perform hostname validation when connecting to Windows agents. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections to build agents.

Amazon EC2 Plugin 1.50.2 by default no longer accepts self-signed HTTPS certificates and performs hostname validation. A new configuration option allows restoring the previous, unsafe behavior. For more information see the plugin documentation.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-2187
• https://jenkins.io/security/advisory/2020-05-06/#SECURITY-1528
• http://www.openwall.com/lists/oss-security/2020/05/06/3
• https://github.com/advisories/GHSA-c89c-pvm7-33wj