CVE-2020-2234

Vulnerability

Overview

The Pipeline Maven Integration Plugin for Jenkins, up to version 3.8.2, contains a missing permission check vulnerability ([CVE-2020-2234]). This flaw allows any user with the Overall/Read permission to interact with a JDBC connection specified by an attacker. The plugin fails to verify that the user has the necessary permissions to perform the connection operation [2][3].

Exploitation

Conditions

To exploit this vulnerability, an attacker must first obtain credentials IDs from another Jenkins vulnerability or method, then supply both a malicious JDBC URL and those credential IDs. The attack is executed by sending a request that triggers the plugin to connect to the attacker-specified URL [1][4]. No authentication beyond Overall/Read is required for this specific action.

Impact

Successful exploitation enables the attacker to have the Jenkins controller connect to an arbitrary database JDBC URL. If the connection uses stored credentials (e.g., database passwords), those credentials may be captured by the attacker, leading to credential theft. This could further compromise the Jenkins environment and integrated systems [2][3].

Mitigation

The vulnerability is fixed in Pipeline Maven Integration Plugin version 3.8.3, released on 2020-08-12 [4]. All users are advised to upgrade immediately. There is no known workaround; Jenkins instances where Overall/Read access is given to untrusted users are at higher risk [3][4].