A flawed DNS rebinding protection issue was discovered in GitLab CE/EE 10.2 and later in the `url_blocker.rb` which could result in SSRF where the library is utilized.Referenceshttps://about.gitlab.com/releases/2019/07/29/security-release-gitlab-12-dot-1-dot-2-released/https://hackerone.com/reports/632101https://gitlab.com/gitlab-org/gitlab-ce/issues/63959
