The USN-3670-1: elfutils vulnerabilities vulnerability is fixed automatically and installed on SecureDrop production instances. I received the following OSSEC alert.
OSSEC HIDS Notification. 2018 Jun 06 04:49:27 Received From: (app) A.B.C.D->/var/log/dpkg.log Rule: 2902 fired (level 7) -> "New dpkg (Debian Package) installed." Portion of the log(s): 2018-06-06 04:49:26 status installed libelf1:amd64 0.158-0ubuntu5.3 --END OF NOTIFICATION OSSEC HIDS Notification. 2018 Jun 06 04:49:27 Received From: (app) A.B.C.D->/var/log/dpkg.log Rule: 2902 fired (level 7) -> "New dpkg (Debian Package) installed." Portion of the log(s): 2018-06-06 04:49:27 status installed libc-bin:amd64 2.19-0ubuntu6.14 --END OF NOTIFICATION