CVE-2020-2242: 
Java vulnerability analysis and mitigation

CVE-2020-2242 is a permission check vulnerability discovered in the Jenkins Database Plugin version 1.6 and earlier, disclosed on September 1, 2020. The vulnerability affects the form validation method implementation in the plugin, which lacks proper permission checks (Jenkins Advisory).

The vulnerability stems from the Database Plugin's failure to perform adequate permission checks in a method implementing form validation. This security flaw allows attackers with Overall/Read access to Jenkins to connect to an attacker-specified database server using attacker-specified username and password credentials. The vulnerability has been assigned a Medium severity CVSS score (Jenkins Advisory).

The vulnerability enables attackers with basic Overall/Read access to Jenkins to establish unauthorized database connections using attacker-controlled credentials. This could potentially lead to unauthorized access to database systems and exposure of sensitive information (Jenkins Advisory).

The vulnerability can be exploited by attackers who have Overall/Read access to Jenkins. The exploitation is facilitated by the lack of proper permission checks in the form validation method (Jenkins Advisory).

The vulnerability has been fixed in Database Plugin version 1.7, which implements proper permission checks by requiring POST requests and Overall/Administer permission for the affected form validation method. Users are advised to upgrade to this version to mitigate the vulnerability (Jenkins Advisory).