http://www.squidguard.org/Downloads/Patches/1.4/squidGuard-1.4-patch-20091019.tar.gz

diff -Naurp squidGuard-1.4/src/sgDiv.c.in squidGuard-1.4.oden/src/sgDiv.c.in
--- squidGuard-1.4/src/sgDiv.c.in	2008-07-14 18:02:43.000000000 +0200
+++ squidGuard-1.4.oden/src/sgDiv.c.in	2009-10-19 21:26:04.000000000 +0200
@@ -745,7 +745,7 @@ char *sgParseRedirect(redirect, req, acl
       p++;
       break;
     case 'u': /* Requested URL */
-      strcat(buf, req->orig);
+      strncat(buf, req->orig, 2048);
       p++;
       break;
     default:
diff -Naurp squidGuard-1.4/src/sg.h.in squidGuard-1.4.oden/src/sg.h.in
--- squidGuard-1.4/src/sg.h.in	2009-10-31 13:20:11.383445826 +0100
+++ squidGuard-1.4.oden/src/sg.h.in	2009-10-31 13:27:11.155445643 +0100
@@ -73,7 +73,7 @@ int tolower();
 #define REQUEST_TYPE_REDIRECT   2
 #define REQUEST_TYPE_PASS       3
 
-#define MAX_BUF 4096
+#define MAX_BUF 12288
 
 #define DEFAULT_LOGFILE "squidGuard.log"
 #define WARNING_LOGFILE "squidGuard.log"