CVE-2015-5673
eventapp/lib/gcloud.rb in the ISUCON5 qualifier portal (aka eventapp) web application before 2015-10-30 makes improper popen calls, which allows remote attackers to execute arbitrary commands via an HTTP request that includes shell metacharacters in an argument to a "gcloud compute" command.
Date published : 2015-11-03
https://github.com/isucon/isucon5-qualify/commit/150e3e6d851acb31a0b15ce93380a7dab14203fa