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Category:   OS (UNIX)  >   Apple Font Book Vendors:   Apple
Apple Font Book Can Be Crashed By Specially Crafted Font Collections
SecurityTracker Alert ID:  1014608
SecurityTracker URL:  http://securitytracker.com/id/1014608
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Aug 2 2005
Impact:   Denial of service via network
Exploit Included:  Yes  

Description:   A vulnerability was reported in Apple Font Book. A remote user may be able to cause a target user's application to crash.

A remote user can create a specially named collection of fonts. When the collection is added by the target user, the Font Book application will crash on the target system.

A long string of characters can trigger the flaw.

new.security at gmail.com reported this vulnerability.

Impact:   A user can create a specially crafted font "collection" that will crash the target user's Font Book application.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.apple.com/ (Links to External Site)
Cause:   Boundary error

Message History:   None.


 Source Message Contents

Subject:  font book crash os x

font book allows users to add new "collections" of fonts with a name of thier choice. When the name of the collection is a very very
 very large string of characters it crashes. here is the gdb output:
_____________________________________________________________
(gdb) run 
Starting program: /Applications/Font Book.app/Contents/MacOS/Font Book 
Reading symbols for shared libraries ........................................................................... done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0xf00f0070
[Switching to process 5539 thread 0x4103]
0x9285a784 in -[NSString(NSPathUtilities) stringByAppendingPathExtension:] ()
(gdb) 
__________________________________________________
for this to crash the collection name must contain thousands of characters.

 
 


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