Jenkins Security Advisory 2017-03-20

SECURITY-161 / CVE-2017-2648

The SSH Build Agents Plugin did not perform host key verification, thereby enabling Man-in-the-Middle attacks.

SECURITY-251 / CVE-2017-2649

The Active Directory Plugin did not verify certificates of the Active Directory server, thereby enabling Man-in-the-Middle attacks.

SECURITY-336 / CVE-2017-2650

Use of this plugin enables a bypass of the Script Security sandbox for users with SCM commit access, as well as users with e.g. Job/Configure permission in Jenkins.

SECURITY-372 / CVE-2017-2651 (Mailer) and CVE-2017-2654 (Email Extension)

The Mailer and Email Extension Plugins are able to send emails to a dynamically created list of users based on the changelogs, like "authors of SCM changes since the last successful build".

This could in some cases result in emails being sent to people who have no user account in Jenkins, and in rare cases even people who were not involved in whatever project was being built, due to some mapping based on the local-part of email addresses.

SECURITY-386 / CVE-2017-2652

There were no permission checks performed in the Distributed Fork plugin that provides the dist-fork CLI command beyond the basic check for Overall/Read permission, allowing anyone with that permission to run arbitrary shell commands on all connected nodes.