Introduce message parser for owncloud.

This message parser is able to detect brute-force
login attempts against a local running owncloud
instance.

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>

diff --git a/modules/Parser.pm b/modules/Parser.pm
index e50cef788f693c60ff9f685b0fac5b31cfff826e..1a6471ae34d2211ef72384757589bfe12a7cb8d7 100644 (file)
--- a/modules/Parser.pm
+++ b/modules/Parser.pm
@@ -10,6 +10,7 @@ our @EXPORT_OK = qw(IsSupportedParser Parser);
 # has to be called to parse messages in the right way.
 my %logfile_parsers = (
        "httpd" => \&message_parser_httpd,
+       "owncloud" => \&message_parser_owncloud,
        "snort" => \&message_parser_snort,
        "ssh" => \&message_parser_ssh,
 );
@@ -277,4 +278,55 @@ sub message_parser_httpd (@) {
        return;
 }
 
+#
+## The Owncloud message parser.
+#
+## This subfunction is used for parsing and detecting brute-force login
+## attempts against a local running owncloud instance.
+#
+sub message_parser_owncloud (@) {
+       my @message = @_;
+       my @actions;
+
+       # The name of the parser module.
+       my $name = "Owncloud";
+
+       # Variable to store the grabbed IP-address.
+       my $address;
+
+       # Variable to store the parsed event.
+       my $message;
+
+       # Loop through all lines, in case multiple one have
+       # been passed.
+       foreach my $line (@message) {
+                # This will catch brute-force attacks against the login (username).
+               if ($line =~/.*\"Login failed: \'(.*)\' \(Remote IP: \'(.*)\'\,.*/) {
+                       # Store the grabbed user name.
+                       my $user = $1;
+
+                       # Store the grabbed IP-address.
+                       $address = $2;
+
+                       # Set event message.
+                       $message = "Possible brute-force attack, wrong password for user: $user.";
+               }
+
+               # Check if at least the IP-address information has been extracted.
+               if (defined ($address)) {
+                       # Add the extracted values and event message to the actions array.
+                       push(@actions, "count $address $name $message");
+               }
+       }
+
+       # If any actions are required, return the array.
+       if (@actions) {
+               return @actions;
+       }
+
+       # If we got here, the provided message is not affected by any filter and
+       # therefore can be skipped. Return nothing (False) in this case.
+       return;
+}
+
 1;