3cdaemon tftp server DOS vulnerability

[Wang Ning <nwang () scn com cn>]

AUTHOR:
(Fortinet, inc)
Ning Wang<nwang_at_scn_com_cn>

DATE:
15/12/2004

PRODUCTS:
 3cdaemon version 2.0 revision 10

Description:
 3com product 3cdaemon is one of the most popular used tools to achieve files backup and upgrade. 

Detail:
  3com tftp daemon exist a vulnerability, which will encounter a fatal error when recieves too long request with opmode 
0x01.
  based on the testing report, any user supplied command string whose length of its filename partion exceeds 512 bytes 
will easily duplicate this error ,and also Denial of service happends.  
  
  According to the limitation of the File Length is less than 188 bytes on cisco platform.