1 Fix for CVE-2016-10197

     2 

     3 More details at:

     4 

     5   https://github.com/libevent/libevent/issues/332

     6 

     7 Based on commit at:

     8 

     9   https://github.com/libevent/libevent/commit/ec65c42052d95d2c23d1d837136d1cf1d9ecef9e

    10 

    11 --- libevent-1.4.14/evdns.c.orig	2017-02-03 06:49:17.767210211 +0000

    12 +++ libevent-1.4.14/evdns.c	2017-02-03 06:50:41.005061826 +0000

    13 @@ -2492,9 +2491,11 @@

    14  static char *

    15  search_make_new(const struct search_state *const state, int n, const char *const base_name) {

    16  	const int base_len = strlen(base_name);

    17 -	const char need_to_append_dot = base_name[base_len - 1] == '.' ? 0 : 1;

    18 +	char need_to_append_dot;

    19  	struct search_domain *dom;

    20  

    21 +	if (!base_len) return NULL;

    22 +	need_to_append_dot = base_name[base_len - 1] == '.' ? 0 : 1;

    23  	for (dom = state->head; dom; dom = dom->next) {

    24  		if (!n--) {

    25  			/* this is the postfix we want */