Preparing security update 0.8.4-3+squeeze2 for apache- anchros

config/filter.d/apache-auth.conf

@@ -5,6 +5,12 @@
 # $Revision: 728 $
 #
 
+[INCLUDES]
+
+# Read common prefixes. If any customizations available -- read them from
+# common.local
+before = apache-common.conf
+
 [Definition]
 
 # Option:  failregex
@@ -14,9 +20,7 @@
 #          (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
 # Values:  TEXT
 #
-failregex = [[]client <HOST>[]] user .* authentication failure
-            [[]client <HOST>[]] user .* not found
-            [[]client <HOST>[]] user .* password mismatch
+failregex = ^%(_apache_error_client)s user .* (authentication failure|not found|password mismatch)\s*$
 
 # Option:  ignoreregex
 # Notes.:  regex to ignore. If this regex matches, the line is ignored.

config/filter.d/apache-common.conf

@@ -0,0 +1,17 @@
+# Generic configuration items (to be used as interpolations) in other
+# apache filters
+#
+# Author: Yaroslav Halchenko
+#
+#
+
+[INCLUDES]
+
+# Load customizations if any available
+after = apache-common.local
+
+
+[DEFAULT]
+
+# Common prefix for [error] apache messages which also would include <HOST>
+_apache_error_client = \[[^]]+\] \[error\] \[client <HOST>\]

config/filter.d/apache-nohome.conf

@@ -5,6 +5,12 @@
 # $Revision: 716 $
 #
 
+[INCLUDES]
+
+# Read common prefixes. If any customizations available -- read them from
+# common.local
+before = apache-common.conf
+
 [Definition]
 
 # Option:  failregex
@@ -14,7 +20,7 @@
 #          per-domain log files.
 # Values:  TEXT
 #
-failregex = [[]client <HOST>[]] File does not exist: .*/~.*
+failregex = ^%(_apache_error_client)s File does not exist: .*/~.*
 
 # Option:  ignoreregex
 # Notes.:  regex to ignore. If this regex matches, the line is ignored.

config/filter.d/apache-noscript.conf

@@ -5,6 +5,12 @@
 # $Revision: 728 $
 #
 
+[INCLUDES]
+
+# Read common prefixes. If any customizations available -- read them from
+# common.local
+before = apache-common.conf
+
 [Definition]
 
 # Option:  failregex
@@ -14,8 +20,8 @@
 #          (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
 # Values:  TEXT
 #
-failregex = [[]client <HOST>[]] (File does not exist|script not found or unable to stat): /\S*(\.php|\.asp|\.exe|\.pl)
-            [[]client <HOST>[]] script '/\S*(\.php|\.asp|\.exe|\.pl)\S*' not found or unable to stat *$
+failregex = ^%(_apache_error_client)s (File does not exist|script not found or unable to stat): /\S*(\.php|\.asp|\.exe|\.pl)\s*$
+            ^%(_apache_error_client)s script '/\S*(\.php|\.asp|\.exe|\.pl)\S*' not found or unable to stat\s*$
 
 # Option:  ignoreregex
 # Notes.:  regex to ignore. If this regex matches, the line is ignored.

config/filter.d/apache-overflows.conf

@@ -5,13 +5,19 @@
 # $Revision: 668 $
 #
 
+[INCLUDES]
+
+# Read common prefixes. If any customizations available -- read them from
+# common.local
+before = apache-common.conf
+
 [Definition]
 
 # Option:  failregex
 # Notes.:  Regexp to catch Apache overflow attempts.
 # Values:  TEXT
 #
-failregex = [[]client <HOST>[]] (Invalid method in request|request failed: URI too long|erroneous characters after protocol string)
+failregex = ^%(_apache_error_client)s (Invalid method in request|request failed: URI too long|erroneous characters after protocol string)
 
 # Option:  ignoreregex
 # Notes.:  regex to ignore. If this regex matches, the line is ignored.

debian/changelog

@@ -1,3 +1,11 @@
+fail2ban (0.8.4-3+squeeze2) squeeze-security; urgency=high
+
+  * Anchor apache- filters failregexes to avoid possible DoS on servers
+    which enabled corresponding jails. Fix cherry-picked from upstream
+    0.8.9-29-g6ccd578 . See http://seclists.org/fulldisclosure/2013/Jun/66
+
+ -- Yaroslav Halchenko <debian@onerussian.com>  Wed, 12 Jun 2013 14:27:07 -0400
+
 fail2ban (0.8.4-3+squeeze1) stable; urgency=low
 
   [ Jonathan Wiltshire ]