Bounds-checking fix to prevent remote exploit.

svn path=/trunk/; revision=3729

1 files changed, 2 insertions, 0 deletions

diff --git a/mxget.c b/mxget.c
index 3bb6cd8c..5cc41064 100644
--- a/mxget.c
+++ b/mxget.c
@@ -68,6 +68,8 @@ struct mxentry *getmxrecords(const char *name)
     n = res_search(name, C_IN,T_MX, (unsigned char *)&answer, sizeof(answer));
     if (n == -1)
 	return((struct mxentry *)NULL);
+    if (n > sizeof(answer))
+	n = sizeof(answer);    	
 
     hp = (HEADER *)&answer;
     cp = answer + HFIXEDSZ;