http://rt.openssl.org/Ticket/Display.html?id=1931&user=guest&pass=guest

Index: openssl/crypto/pqueue/pqueue.c
RCS File: /v/openssl/cvs/openssl/crypto/pqueue/pqueue.c,v
rcsdiff -q -kk '-r1.2.2.4' '-r1.2.2.5' -u '/v/openssl/cvs/openssl/crypto/pqueue/pqueue.c,v' 2>/dev/null
--- crypto/pqueue/pqueue.c	2005/06/28 12:53:33	1.2.2.4
+++ crypto/pqueue/pqueue.c	2009/05/16 16:18:44	1.2.2.5
@@ -234,3 +234,17 @@
 
 	return ret;
 	}
+
+int
+pqueue_size(pqueue_s *pq)
+{
+	pitem *item = pq->items;
+	int count = 0;
+	
+	while(item != NULL)
+	{
+		count++;
+		item = item->next;
+	}
+	return count;
+}
Index: openssl/crypto/pqueue/pqueue.h
RCS File: /v/openssl/cvs/openssl/crypto/pqueue/pqueue.h,v
rcsdiff -q -kk '-r1.2.2.1' '-r1.2.2.2' -u '/v/openssl/cvs/openssl/crypto/pqueue/pqueue.h,v' 2>/dev/null
--- crypto/pqueue/pqueue.h	2005/05/30 22:34:27	1.2.2.1
+++ crypto/pqueue/pqueue.h	2009/05/16 16:18:44	1.2.2.2
@@ -91,5 +91,6 @@
 pitem *pqueue_next(piterator *iter);
 
 void   pqueue_print(pqueue pq);
+int    pqueue_size(pqueue pq);
 
 #endif /* ! HEADER_PQUEUE_H */
Index: openssl/ssl/d1_pkt.c
RCS File: /v/openssl/cvs/openssl/ssl/d1_pkt.c,v
rcsdiff -q -kk '-r1.4.2.17' '-r1.4.2.18' -u '/v/openssl/cvs/openssl/ssl/d1_pkt.c,v' 2>/dev/null
--- ssl/d1_pkt.c	2009/05/16 15:51:59	1.4.2.17
+++ ssl/d1_pkt.c	2009/05/16 16:18:45	1.4.2.18
@@ -167,6 +167,10 @@
     DTLS1_RECORD_DATA *rdata;
 	pitem *item;
 
+	/* Limit the size of the queue to prevent DOS attacks */
+	if (pqueue_size(queue->q) >= 100)
+		return 0;
+		
 	rdata = OPENSSL_malloc(sizeof(DTLS1_RECORD_DATA));
 	item = pitem_new(priority, rdata);
 	if (rdata == NULL || item == NULL)