Add specs to verify server header matching

lib/metasploit/framework/login_scanner/glassfish.rb

@@ -194,8 +194,8 @@ module Metasploit
         # @return [nil] If the banner did not match any of the expected values
         def extract_version(banner)
           # Set version.  Some GlassFish servers return banner "GlassFish v3".
-          if banner =~ /(GlassFish Server|Open Source Edition)[[:blank:]]*(\d\.\d)/
-            @version = $2
+          if banner =~ /GlassFish Server(?: Open Source Edition)?[[:blank:]]*(\d\.\d)/
+            @version = $1
           elsif banner =~ /GlassFish v(\d)/
             @version = $1
           elsif banner =~ /Sun GlassFish Enterprise Server v2/

spec/lib/metasploit/framework/login_scanner/glassfish_spec.rb

@@ -297,12 +297,35 @@ describe Metasploit::Framework::LoginScanner::Glassfish do
   end
 
   context '#extract_version' do
-    let(:server_header) { "GlassFish Server Open Source Edition  4.0" }
+    # Thanks to shodan for Server headers
+    subject(:extracted_version) { http_scanner.extract_version(server_header) }
 
-    specify do
-      expect(http_scanner.extract_version(server_header)).to eq("4.0")
+    context 'with 9.1 header' do
+      let(:server_header) { "Sun Java System Application Server 9.1_02" }
+      it { is_expected.to start_with("9") }
     end
 
+    context 'with 4.0 header' do
+      let(:server_header) { "GlassFish Server Open Source Edition  4.0" }
+      it { is_expected.to start_with("4") }
+    end
+
+    context 'with 3.0 header' do
+      let(:server_header) { "GlassFish Server Open Source Edition 3.0.1" }
+      it { is_expected.to start_with("3") }
+    end
+
+    context 'with 2.1 header' do
+      let(:server_header) { "Sun GlassFish Enterprise Server v2.1" }
+      it { is_expected.to start_with("2") }
+    end
+
+    context 'with bogus header' do
+      let(:server_header) { "Apache-Coyote/1.1" }
+      it { is_expected.to be_nil }
+    end
+
+
   end
 
 end