Skip whitelisted vulnerabilities in Container Scanning

Update fixture to provide meaningful data.

ee/changelogs/unreleased/9251-skip_whitelisted_vulnerabilities.yml

+---
+title: Skip whitelisted vulnerabilities in Container Scanning reports
+merge_request: 9528
+author:
+type: fixed

ee/lib/gitlab/ci/parsers/security/container_scanning.rb

@@ -26,9 +26,13 @@ module Gitlab
           # Transforms the Clair JSON report into the expected format
           def format_report(data)
             vulnerabilities = data['vulnerabilities']
+            unapproved = data['unapproved']
             results = []
 
             vulnerabilities.each do |vulnerability|
+              # We only report unapproved vulnerabilities
+              next unless unapproved.include?(vulnerability['vulnerability'])
+
               results.append(format_vulnerability(vulnerability))
             end
 

ee/spec/lib/gitlab/ci/parsers/security/container_scanning_spec.rb

@@ -25,7 +25,7 @@ describe Gitlab::Ci::Parsers::Security::ContainerScanning do
       end
     end
 
-    it "parses all identifiers and occurrences" do
+    it "parses all identifiers and occurrences for unapproved vulnerabilities" do
       expect(report.occurrences.length).to eq(8)
       expect(report.identifiers.length).to eq(8)
       expect(report.scanners.length).to eq(1)

spec/fixtures/security-reports/master/gl-container-scanning-report.json

 {
   "image": "registry.gitlab.com/groulot/container-scanning-test/master:5f21de6956aee99ddb68ae49498662d9872f50ff",
   "unapproved": [
-    "CVE-2017-18018",
-    "CVE-2016-2781",
-    "CVE-2017-12424",
-    "CVE-2007-5686",
-    "CVE-2013-4235"
+    "CVE-2017-18269",
+    "CVE-2017-16997",
+    "CVE-2018-1000001",
+    "CVE-2016-10228",
+    "CVE-2018-18520",
+    "CVE-2010-4052",
+    "CVE-2018-16869",
+    "CVE-2018-18311"
   ],
   "vulnerabilities": [
     {
@@ -87,6 +90,16 @@
       "link": "https://security-tracker.debian.org/tracker/CVE-2018-18311",
       "severity": "Unknown",
       "fixedby": "5.24.1-3+deb9u5"
+    },
+    {
+      "featurename": "foo",
+      "featureversion": "1.3",
+      "vulnerability": "CVE-2018-666",
+      "namespace": "debian:9",
+      "description": "Foo has a vulnerability nobody cares about and whitelist.",
+      "link": "https://security-tracker.debian.org/tracker/CVE-2018-666",
+      "severity": "Unknown",
+      "fixedby": "1.4"
     }
   ]
 }