Apply by doing:
	cd /usr/src
	patch -p0 < 022_httpd.patch

And then rebuild and install httpd:
	cd usr.sbin/httpd
	make -f Makefile.bsd-wrapper obj
	make -f Makefile.bsd-wrapper cleandir
	make -f Makefile.bsd-wrapper
	make -f Makefile.bsd-wrapper install

Index: usr.sbin/httpd/src/main/http_protocol.c
===================================================================
RCS file: /cvs/src/usr.sbin/httpd/src/main/http_protocol.c,v
retrieving revision 1.9
retrieving revision 1.9.4.1
diff -u -r1.9 -r1.9.4.1
--- usr.sbin/httpd/src/main/http_protocol.c	2001/03/29 10:21:43	1.9
+++ usr.sbin/httpd/src/main/http_protocol.c	2002/06/19 07:37:11	1.9.4.1
@@ -1964,20 +1964,34 @@
 static long get_chunk_size(char *b)
 {
     long chunksize = 0;
+    long chunkbits = sizeof(long) * 8;
 
-    while (ap_isxdigit(*b)) {
+    /* Skip leading zeros */
+    while (*b == '0') {
+        ++b;
+    }
+
+    while (ap_isxdigit(*b) && (chunkbits > 0)) {
         int xvalue = 0;
 
-        if (*b >= '0' && *b <= '9')
+        if (*b >= '0' && *b <= '9') {
             xvalue = *b - '0';
-        else if (*b >= 'A' && *b <= 'F')
+        }
+        else if (*b >= 'A' && *b <= 'F') {
             xvalue = *b - 'A' + 0xa;
-        else if (*b >= 'a' && *b <= 'f')
+        }
+        else if (*b >= 'a' && *b <= 'f') {
             xvalue = *b - 'a' + 0xa;
+        }
 
         chunksize = (chunksize << 4) | xvalue;
+        chunkbits -= 4;
         ++b;
     }
+    if (ap_isxdigit(*b) && (chunkbits <= 0)) {
+        /* overflow */
+        return -1;
+    }
 
     return chunksize;
 }
@@ -2060,6 +2074,10 @@
                 return 0;
             }
             r->remaining = -1;  /* Indicate footers in-progress */
+        }
+        else if (len_to_read < 0) {
+            r->connection->keepalive = -1;
+            return -1;
         }
         else {
             r->remaining = len_to_read;