Fix possible overflow in check_ups (Fixes: #1030)

1 files changed, 4 insertions, 1 deletions

diff --git a/plugins/check_ups.c b/plugins/check_ups.c
index e9e56a51..0de37a20 100644
--- a/plugins/check_ups.c
+++ b/plugins/check_ups.c
@@ -402,7 +402,10 @@ get_ups_variable (const char *varname, char *buf, size_t buflen)
 
         /* create the command string to send to the UPS daemon */
         /* Add LOGOUT to avoid read failure logs */
-        sprintf (send_buffer, "GET VAR %s %s\nLOGOUT\n", ups_name, varname);
+        if (snprintf (send_buffer, sizeof(send_buffer), "GET VAR %s %s\nLOGOUT\n", ups_name, varname) >= sizeof(send_buffer)) {
+                printf("%s\n", _("UPS name to long for buffer"));
+                return ERROR;
+        }
 
         /* send the command to the daemon and get a response back */
         if (process_tcp_request