CVE-2019-3845

A lack of access control was found in the message queues maintained by Satellite's QPID broker and used by katello-agent. A malicious user authenticated to a host registered to Satellite (or Capsule) can use this flaw to access QMF methods to any host also registered to Satellite (or Capsule) and execute privileged commands.

On Red Hat Satellite 6.5, the Satellite 6.5 GA release includes a version of katello-installer-base that provides the fixes for this issue.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

On Satellite Server follow the instructions below:

• Modify /etc/qpid/qpidd.conf to add this line:

acl-file=qpid_acls.acl

• Create a new file: /var/lib/qpidd/.qpidd/qpid_acls.acl with content:

acl allow katello_agent@QPID create queue acl allow katello_agent@QPID consume queue acl allow katello_agent@QPID access exchange acl allow katello_agent@QPID access queue acl allow katello_agent@QPID publish exchange routingkey=pulp.task acl allow katello_agent@QPID publish exchange name=qmf.default.direct acl allow katello_agent@QPID access method name=create

acl deny-log katello_agent@QPID access method name=* acl deny-log katello_agent@QPID all all

allow anything else

acl allow all all

• As root, execute the command:

systemctl restart qpidd

• In /etc/qpid-dispatch/qdrouterd.conf modify the connector:

connector { name: broker host: localhost port: 5671 sasl-mechanisms: PLAIN sasl-username: katello_agent sasl-password: katello_agent role: route-container ssl-profile: client idle-timeout-seconds: 0 }

• As root, execute the command:

systemctl restart qdrouterd

These ACLs will prevent clients to redirect or move messages to various queues which is the nature of the CVE. All other behavior will be unchanged (acl allow all all) which is the current baseline.