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- Xref: sparky comp.os.os2.apps:5946 comp.security.misc:1191
- Newsgroups: comp.os.os2.apps,comp.security.misc
- Path: sparky!uunet!sun-barr!ames!news.hawaii.edu!wiliki.eng.hawaii.edu!newsham
- From: newsham@wiliki.eng.hawaii.edu (Timothy Newsham)
- Subject: Re: Self-Extracting Binaries dangerous? (Was: REXXShip: Self-Extracting UUEncode!)
- Message-ID: <1992Sep8.033942.15272@news.Hawaii.Edu>
- Sender: root@news.Hawaii.Edu (News Service)
- Nntp-Posting-Host: wiliki.eng.hawaii.edu
- Organization: University of Engineering, College of Engineering
- References: <dank.715798089@blacks> <1992Sep6.175645.24543@midway.uchicago.edu> <PSHUANG.92Sep6171439@m4-035-13.mit.edu>
- Date: Tue, 8 Sep 1992 03:39:42 GMT
- Lines: 40
-
- In article <PSHUANG.92Sep6171439@m4-035-13.mit.edu> pshuang@athena.mit.edu (Ping-Shun Huang) writes:
- >In article <1992Sep6.175645.24543@midway.uchicago.edu> sip1@ellis.uchicago.edu (Timothy F. Sipples) writes:
- >
- > > If someone hands you a file called FORMAT11.EXE it could be a self
- > > extracting archive. Or could it do something more dangerous? You
- > > just don't know. Unless you take the file and spend hours with a
- > > code examiner of some sort, disassembling the code, you won't know
- > > what it does until you run it. REXXShip is definitely not like this.
- >
- > > Arguably REXXShip format is safer than UUEncoded format since the
- > > UUDecode utility itself could have been altered by a devious person.
- > > REXXShip at least elminates one step.
- >
- >This reveals a strong argument for the equivalent to an "uudecode"
- >utility to be shipped with the operating system -- that way, you don't
- >need to worry any more about a spoofed uudecode utility than a spoofed
- >REXX interpreter which might interpret a REXX script that *LOOKS*
- >harmless in a harmful manner.
- >
- >--
- >Ping Huang (INTERNET: pshuang@athena.mit.edu), probably speaking for himself
- >
-
- You still end up putting trust in a binary you have no idea about:
-
- (1) download zip.uu
- (2) un-uudecode to get 'zip'
- (3) can use zip from now on.
-
- or
-
- (1) download zip.sua (self un archive)
- (2) run zip.sui to get 'zip'
- (3) can use zip from now on.
-
- what is the difference between trusting 'zip' and trusting 'zip.sui' ??
- Either one could contain a trojan horse. Neither one is safer than
- the other. (note this argument is re: including uuencode, not
- about the Rexx self dearchive)
-
-