It was possible to make the remote host crash by issuing this FTP command : CEL aaaa(...)aaaa This problem is similar to the 'aix ftpd' overflow but on embedded vxworks based systems like the 3com nbx IP phone call manager and seems to cause the server to crash.

If you are using an embedded vxworks product, please contact the OEM vendor and reference WindRiver field patch TSR 296292. If this is the 3com NBX IP Phone call manager, contact 3com. This affects VxWorks ftpd versions 5.4 and 5.4.2 For more information, see CERT VU 317417 http://www.kb.cert.org/vuls/id/317417 or full security alert at http://www.secnap.net/security/nbx001.html