There is a /tmp file race condition in chef/travis-cookbooks/ci_environment/perlbrew/recipes/default.rb in the ciborg gem 3.0.0 when creating /tmp/perlbrew-installer. If a malicious local user creates the file first they can overwrite the contents with their own code executing it as the ciborg process owner.
{
"severity": "MODERATE",
"github_reviewed_at": "2020-06-16T21:36:44Z",
"nvd_published_at": "2018-01-10T18:29:00Z",
"cwe_ids": [
"CWE-20"
],
"github_reviewed": true
}