Jenkins Mailer Plugin prior to 408.vd726a_1130320 and 1.34.2 does not perform a permission check in a method implementing form validation.

This allows attackers with Overall/Read access to use the DNS used by the Jenkins instance to resolve an attacker-specified hostname.

Additionally, this form validation method does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.

Mailer Plugin 408.vd726a_1130320 and 1.34.2 require POST requests and Overall/Administer permission for the affected form validation method.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-20613
• https://www.jenkins.io/security/advisory/2022-01-12/#SECURITY-2163
• http://www.openwall.com/lists/oss-security/2022/01/12/6
• https://www.oracle.com/security-alerts/cpuapr2022.html
• jenkinsci/mailer-plugin@5e6051f