plugins/check_real.c - recv string null terminate

Recv into buffer is not properly null terminated prior to strstr and possible other string functions expecting a null termination. Simply take bytes received and use as an index to append \0 after. We are creating buffer[] with size of MAX_INPUT_BUFFER and recv with MAX_INPUT_BUFFER-1 so this should never overflow.

1 files changed, 1 insertions, 0 deletions

diff --git a/plugins/check_real.c b/plugins/check_real.c
index 47776c5..36f6413 100644
--- a/plugins/check_real.c
+++ b/plugins/check_real.c
@@ -178,6 +178,7 @@ main (int argc, char **argv)
 
                 /* watch for the REAL connection string */
                 result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
+                buffer[result] = "\0"; /* null terminate recieved buffer */
 
                 /* return a CRITICAL status if we couldn't read any data */
                 if (result == -1) {