CVE-2020-2186: 
Java vulnerability analysis and mitigation

A cross-site request forgery (CSRF) vulnerability was discovered in Jenkins Amazon EC2 Plugin versions 1.50.1 and earlier. The vulnerability, identified as CVE-2020-2186, was disclosed on May 6, 2020. This security flaw affects the Jenkins Amazon EC2 Plugin, which is used for provisioning Amazon EC2 instances in Jenkins environments (Jenkins Advisory, NVD).

The vulnerability stems from the plugin's failure to require POST requests in several HTTP endpoints. The severity of this vulnerability is rated as Low with a CVSS v3.1 base score of 4.3 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N. The vulnerability is classified as CWE-352: Cross-Site Request Forgery (CSRF) (NVD).

The vulnerability allows attackers to provision EC2 instances with an attacker-specified template ID through cross-site request forgery attacks. This could potentially lead to unauthorized resource provisioning in the AWS environment (Jenkins Advisory).

The vulnerability requires user interaction and can be exploited through cross-site request forgery attacks. An attacker could craft a malicious webpage that, when visited by an authenticated Jenkins user, could trigger unauthorized EC2 instance provisioning (Jenkins Advisory).

The vulnerability has been fixed in Amazon EC2 Plugin version 1.50.2. The updated version now requires POST requests for the affected HTTP endpoints, preventing CSRF attacks. Users are advised to upgrade to this version to protect against this vulnerability (Jenkins Advisory).

The vulnerability was responsibly disclosed and addressed through the Jenkins security advisory process. The discovery was credited to Oleg Nenashev from CloudBees, Inc., who reported the vulnerability to the Jenkins security team (Jenkins Advisory).