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- From: simons/G=Colin/I=CB/S=Sewell/O=H.A.Simons.Ltd/OU=CORP@mhs.attmail.com
- Newsgroups: comp.os.vms
- Subject: Re: HELP: how to stop and prevent break in?
- Message-ID: <9211161850.AA00437@ucbvax.Berkeley.EDU>
- Date: 15 Nov 92 23:52:53 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 51
-
- ttytst@merak.usc.edu (Guess what) writes:
-
- |We got very strange things happened on one account where we found the owner of
- |files are not only the owner of the account but also another one.
- |
- | OWNER=[my,WHO]
- |
- |All the files and directories under that account have two owners and we are
- |sure that the other one is illegal. What we need to know right now is how to
- |prevent this kind of things happened again and how to remove the illegal one
- |from the ownership without SYSTEM ADMINSTATROR's Privilage. Thanks in
- |advance.
-
- correct me if i'm wrong, but i think you have a misunderstanding
- of what those two fields in the alphabetic uic file owner means.
- a file cannot be owned by two owners, only one. however, a directory
- may display two fields for the owner uic of a file, in your case
- "[MY,WHO]". the first field is the alpha id of the uic GROUP number
- owning the file, the second field is the actual uic OWNER.
-
- when you add a new user to the system with AUTHORIZE, an alpha
- identifier with the value of the user's uic is added to the
- rightslist database. this identifier translates to the username.
- If the account field has a valid identifier format, AUTHORIZE
- also tries to add an identifier with the value
- [uic-group-number,177777]. This identifier translates to the
- account name of the user. When the system displays uics in
- alpha format it tries to look up the value
- [uic-group-number,177777] and, if found, displays that as part of the
- uic; ie: [MY,WHO]. if not found, you'll just see the single alpha uic
- value, ie: [WHO].
-
- so in your case "MY" is the group uic identifier, and "WHO"
- is the complete uic identifier of the file.
-
- check to see if you've added a new user to the system
- with the same group number as the [WHO] uic and who has
- a "MY" in the account field. this would change the directory
- display for all files owned by uic [WHO] to [MY,WHO].
-
- you can remove this extra id display by going into authorize and
- doing a "REMOVE/IDENTIFIER MY" command.
-
- of course my analysis could be totally otl and you really do have
- a problem with unauthorized access to your system. but you'll
- have to give us more information.
-
- colin sewell
- h.a.simons ltd.
- vancouver, bc
-
-