diff -Naur apache_1.3.41-orig/src/modules/standard/mod_rewrite.c apache_1.3.41/src/modules/standard/mod_rewrite.c

--- apache_1.3.41-orig/src/modules/standard/mod_rewrite.c	2006-07-27 20:09:03 +0300

+++ apache_1.3.41/src/modules/standard/mod_rewrite.c	2008-03-31 19:33:24 +0300

@@ -62,6 +62,17 @@

 static LONG locking_sem = 0;

 #endif

+#ifndef REWRITE_MAX_RULES

+#define REWRITE_MAX_RULES 300

+#endif

+#ifndef REWRITE_MAX_REDIRECTS

+#define REWRITE_MAX_REDIRECTS 50

+#endif

+

+#define REWRITE_FIXUP_NOTE "rewrite_fixup_redirect"

+

+int redirect_count;		/* Счетчик циклов для fixup */

+

 /*

 ** +-------------------------------------------------------+

 ** |                                                       |

@@ -1345,6 +1356,34 @@

         return FORBIDDEN;

     }

+    /* Проверим и установим флаг первого запроса */

+    {

+    	request_rec *q;

+    	int note_found = 0;

+    	for (q = r; q != NULL; q = q->prev) {

+    		if( ap_table_get(q->notes, REWRITE_FIXUP_NOTE) != NULL ) {

+				note_found = 1;

+				break;

+    		}

+        }

+		ap_table_set(r->notes, REWRITE_FIXUP_NOTE, "OK");

+		

+	    if( !note_found ) {

+			redirect_count = REWRITE_MAX_REDIRECTS;

+			rewritelog(r, 3, "setting redirect count notice" );

+        }

+    }

+

+    /* Проверим количество циклов */

+    if( redirect_count-- <= 0 ) {

+		/* очень много итераций */

+		ap_log_rerror(APLOG_MARK, APLOG_ERR, r,

+			"too many rewrite internal redirects: %s", r->uri);

+		return HTTP_INTERNAL_SERVER_ERROR;

+	}

+

+	rewritelog(r, 3, "internal redirect count: %d", redirect_count );

+	

     /*

      *  remember the current filename before rewriting for later check

      *  to prevent deadlooping because of internal redirects

@@ -1359,6 +1398,13 @@

     if (rulestatus) {

         unsigned skip;

+		if (strlen(r->filename) > 20 &&

+			strncmp(r->filename, "too_many_iterations:", 20) == 0) {

+			/* очень много итераций */

+			ap_log_rerror(APLOG_MARK, APLOG_ERR, r,

+				"too many rewrite rules (possible loop): %s", r->uri);

+			return HTTP_INTERNAL_SERVER_ERROR;

+        } else

         if (strlen(r->filename) > 6 &&

             strncmp(r->filename, "proxy:", 6) == 0) {

             /* it should go on as an internal proxy request */

@@ -1671,6 +1717,7 @@

     int changed;

     int rc;

     int s;

+    int loopcount = REWRITE_MAX_RULES;

     /*

      *  Iterate over all existing rules

@@ -1679,6 +1726,13 @@

     changed = 0;

     loop:

     for (i = 0; i < rewriterules->nelts; i++) {

+    	if( loopcount-- <= 0 ) {

+			rewritelog(r, 2, "too many iterations '%s'", r->filename);

+			r->filename = ap_pstrcat(r->pool, "too_many_iterations:", r->filename, NULL);

+			changed = ACTION_NORMAL;

+			break;

+    	}

+    	

         p = &entries[i];

         /*