From a mailing list:
This is a very serious matter. I've found an error in how the IPCONFIG
command handles incorrect command line input.
C:\>ipconfig lksdflkjdsakfl
Error: unrecongnized or incomplete command line.
Clearly the error line is supposed to say "unrecognized". I don't know if
this is an exploitable issue. I've only tested it on Windows XP SP2.
Let's hope Microsoft patches this before it's too late!!
<edit> Apparently the German version of Microsoft Windows does not suffer from this problem. You might consider setting your language to German until a patch comes out:
C:\>ipconfig lksdflkjdsakfl
Fehler: Unbekannte oder unvollständige Befehlszeile.
[disclaimer: this is a joke. Anybody who thinks I'm serious should be shot.]