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» SmaugMuds.org » Bugfix Lists » AFKMud Bugfix List » AFKMud Bug Archive » [Bug] strip_cr function has n...
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[Bug] strip_cr function has no protection against NULL strings
< Newer Topic :: Older Topic > AFKMud 1.76a

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Post is unread #1 Nov 6, 2005, 1:56 pm   Last edited Jan 22, 2006, 6:39 pm by Samson
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Samson
Black Hand
GroupAdministrators
Posts3,639
JoinedJan 1, 2002

Bug: strip_cr function has no protection against NULL strings
Discovered in: AFKMud 1.76a
Danger: Critical - Can lead to crashes and corrupted data.
Found by: Samson
Fixed by: Samson

---

build.c, strip_cr

Locate:
   static char newstr[MSL];
   int i, j;


Change to:
   static char newstr[MSL];
   int i, j;

   if( !str || str[0] == '\0' )
      return "";


This simple fix will prevent the strip_cr function from bringing the game down at a most inopportune moment with a NULL string being fed to it. This function is used heavily in the saving of area files so it represents an especially dangerous threat if left unprotected. When fed a NULL string this fix will return just an empty one which is perfectly safe.
       
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