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- Newsgroups: alt.hackers
- Path: sparky!uunet!news.uiowa.edu!hitchcock!stu
- From: stu@hitchcock (Stuart F. Oberman)
- Subject: Re: /etc/passwords
- Sender: news@news.uiowa.edu (News)
- Message-ID: <1992Jul22.223744.24893@news.uiowa.edu>
- Approved: self
- Date: Wed, 22 Jul 1992 22:37:44 GMT
- Reply-To: stu@eng.uiowa.edu
- References: <Brt4nI.IFw@undergrad.math.waterloo.edu>
- Nntp-Posting-Host: hitchcock.eng.uiowa.edu
- Organization: Department of Elect. and Comp. Engr., University of Iowa, USA.
- Lines: 21
-
- Regarding the format of the encryption scheme used by UNIX systems,
- check the man pages on crypt. The resulting encryption is always 13
- characters and stored either in a password file on the individual
- machine in /etc/passwd, or in the yellow pages if using NFS
- yellow pages. Using a ypcat will generate an equivalent file of login
- information.
-
- Obhack: Implementing the aforementioned trojan horse
- scheme, where the yellow pages is consulted and password is verified
- before it writes to a file. However, while this is (somewhat) easily
- done, an additional challenge is to log the user in and mask your own
- process, so that the entire event appears transparent.
-
- --
- ************************************************************************
- Stuart Oberman * Remember, a conservative is just a *
- stu@eng.uiowa.edu * liberal who has been mugged . . . *
- University of Iowa E.E. * *
- ************************************************************************
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