It was reported that Elasticsearch versions prior to 1.6.1 are vulnerable to an unspecified attack, leading to remote code execution. Upstream fix is not known at the time of writing.
Created elasticsearch tracking bugs for this issue: Affects: fedora-all [bug 1244239]
Reference: http://seclists.org/bugtraq/2015/Jul/82
Mitigation: For Satellite 6.x and Sam 1.x you can simply firewall elasticsearch to trusted users only (e.g. root, katello, foreman). For instructions on this please see: https://access.redhat.com/documentation/en-US/Red_Hat_Satellite/6.0/html-single/Installation_Guide/index.html#sect-Red_Hat_Satellite-Installation_Guide-Red_Hat_Satellite_Installation-Configuring_Red_Hat_Satellite_Manually
Updating the severity, for Sam 1.x elasticsearch only listens on localhost, thus local access is required. For Satellite 6.x the installation process should include firewalling it to trusted local users only. As such this only scores 3.3 instead of 5.8 on the CVSS2 scoring.
Statement: This issue affects the versions of elasticsearch as shipped with Red Hat Satellite 6.x and Subscription Asset Manager 1.x. Red Hat Product Security has rated this issue as having Low security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.