When parsing DBus messages to Nameservers.Configuration, check all
space-separated strings, replace non-IPs with empty strings and
remove all empty strings from input.
Sending "123.123.123.123 invalid-ip 8.8.8.8 " will result in
Nameservers.Configuration containing [ 123.123.123.123, 8.8.8.8 ],
rather than [ 123.123.123.123, , invalid-ip, 8.8.8.8, ].
Previously the function only checked that the string starts with a
correct IP and then split the string with spaces as delimiter, thus
accepting bad values.
---
src/service.c | 26 ++++++++++++++++++--------
1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/src/service.c b/src/service.c
index 8ea7c7c..76099f1 100644
--- a/src/service.c
+++ b/src/service.c
@@ -3272,20 +3272,30 @@ static DBusMessage *set_property(DBusConnection *conn,
const char *val;
dbus_message_iter_get_basic(&entry, &val);
dbus_message_iter_next(&entry);
- if (connman_inet_check_ipaddress(val) > 0) {
- if (str->len > 0)
- g_string_append_printf(str, " %s", val);
- else
- g_string_append(str, val);
- }
+
+ if (!val[0])
+ continue;
+
+ if (str->len > 0)
+ g_string_append_printf(str, " %s", val);
+ else
+ g_string_append(str, val);
}
nameserver_remove_all(service, CONNMAN_IPCONFIG_TYPE_ALL);
g_strfreev(service->nameservers_config);
if (str->len > 0) {
- service->nameservers_config =
- g_strsplit_set(str->str, " ", 0);
+ char **nameservers, **iter;
+
+ nameservers = g_strsplit_set(str->str, " ", 0);
+
+ for (iter = nameservers; *iter; iter++)
+ if (connman_inet_check_ipaddress(*iter) <= 0)
+ *iter[0] = '\0';
+
+ nameservers = remove_empty_strings(nameservers);
+ service->nameservers_config = nameservers;
} else {
service->nameservers_config = NULL;
}
--
2.1.0
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