mailman:2.1 mailman security update

Mailman is a program used to help manage e-mail discussion lists.

Security Fix(es):

* mailman: XSS via file attachments in list archives (CVE-2020-12137)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVE-2020-12137
GNU Mailman 2.x before 2.1.30 uses the .obj extension for scrubbed application/octet-stream MIME parts. This behavior may contribute to XSS attacks against list-archive visitors, because an HTTP reply from an archive web server may lack a MIME type, and a web browser may perform MIME sniffing, conclude that the MIME type should have been text/html, and execute JavaScript code.

Modularity name: mailman
Stream name: 2.1