Re: [PATCH] guardian: Add upstream patch for HTTP parser.

[Michael Tremer <michael.tremer@ipfire.org>]

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Reviewed-by: Michael Tremer <michael.tremer(a)ipfire.org>

> On 4 Feb 2020, at 07:59, Stefan Schantl <stefan.schantl(a)ipfire.org> wrote:
> 
> Fixes #12289.
> 
> Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
> ---
> lfs/guardian                                 |  5 ++-
> src/patches/guardian-2.0.2-http-parser.patch | 45 ++++++++++++++++++++
> 2 files changed, 49 insertions(+), 1 deletion(-)
> create mode 100644 src/patches/guardian-2.0.2-http-parser.patch
> 
> diff --git a/lfs/guardian b/lfs/guardian
> index a40480c0c..3e2c3347f 100644
> --- a/lfs/guardian
> +++ b/lfs/guardian
> @@ -33,7 +33,7 @@ DIR_APP    = $(DIR_SRC)/$(THISAPP)
> TARGET     = $(DIR_INFO)/$(THISAPP)
> 
> PROG       = guardian
> -PAK_VER    = 18
> +PAK_VER    = 19
> 
> DEPS       = "perl-inotify2 perl-Net-IP"
> 
> @@ -79,6 +79,9 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
> 	@$(PREBUILD)
> 	@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar axvf $(DIR_DL)/$(DL_FILE)
> 
> +	# Add upstream patches.
> +	cd $(DIR_APP) && patch -Np1 -i $(DIR_SRC)/src/patches/guardian-2.0.2-http-parser.patch
> +
> 	# Adjust path for firewall binaries.
> 	cd $(DIR_APP) && sed -i "s|/usr/sbin/|/sbin/|g" modules/IPtables.pm
> 
> diff --git a/src/patches/guardian-2.0.2-http-parser.patch b/src/patches/guardian-2.0.2-http-parser.patch
> new file mode 100644
> index 000000000..1ecae658c
> --- /dev/null
> +++ b/src/patches/guardian-2.0.2-http-parser.patch
> @@ -0,0 +1,45 @@
> +commit 5028c7fde1fa15e4960f2fec3c025d0338382895
> +Author: Stefan Schantl <stefan.schantl(a)ipfire.org>
> +Date:   Tue Feb 4 07:55:48 2020 +0100
> +
> +    Parser: Adjust HTTP parser to be compatible with newer log format.
> +    
> +    Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
> +
> +diff --git a/modules/Parser.pm b/modules/Parser.pm
> +index 3880228..bcca88f 100644
> +--- a/modules/Parser.pm
> ++++ b/modules/Parser.pm
> +@@ -302,7 +302,7 @@ sub message_parser_httpd (@) {
> + 	# been passed.
> + 	foreach my $line (@message) {
> + 		# This will catch brute-force attacks against htaccess logins (username).
> +-		if ($line =~ /.*\[error\] \[client (.*)\] user(.*) not found:.*/) {
> ++		if ($line =~ /.*\[client (.*)\] .* user(.*) not found:.*/) {
> + 			# Store the grabbed IP-address.
> + 			$address = $1;
> + 
> +@@ -311,7 +311,7 @@ sub message_parser_httpd (@) {
> + 		}
> + 
> + 		# Detect htaccess password brute-forcing against a username.
> +-		elsif ($line =~ /.*\[error\] \[client (.*)\] user(.*): authentication failure for.*/) {
> ++		elsif ($line =~ /.*\[client (.*)\] .* user(.*): authentication failure for.*/) {
> + 			# Store the extracted IP-address.
> + 			$address = $1;
> + 
> +@@ -321,6 +321,14 @@ sub message_parser_httpd (@) {
> + 
> + 		# Check if at least the IP-address information has been extracted.
> + 		if (defined ($address)) {
> ++			# Check if the address also contains a port value.
> ++			if ($address =~ m/:/) {
> ++				my ($add_address, $port) = split(/:/, $address);
> ++
> ++				# Only process the address.
> ++				$address = $add_address;
> ++			}
> ++
> + 			# Add the extracted values and event message to the actions array.
> + 			push(@actions, "count $address $name $message");
> + 		}
> -- 
> 2.25.0
>