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- From: francini@narfvx.enet.dec.com (John Francini)
- Subject: Re: HELP: how to stop and prevent break in?
- Message-ID: <1992Nov21.074919.26668@nntpd.lkg.dec.com>
- Sender: usenet@nntpd.lkg.dec.com (USENET News System)
- Organization: Digital Equipment Corporation, Littleton, MA
- References: <1ds5eqINN185@merak.usc.edu> <bern.721580808@kleopatra> <1e0s7rINNd7@skat.usc.edu>
- Date: Sat, 21 Nov 1992 07:29:14 GMT
- Lines: 70
-
-
- >Thanks for the explanation of the ownerships in the posts, but the
- >problem we encountered is that the first name S892999 shown below is
- >essentially a user's name.
- >
- >~~~~~~~~~~~~~~
- > $ dir login.com;3 /security
- >
- > Directory $DUA0:[STUD.S882000]
- >
- > LOGIN.COM;3 [S892999,S882000] (RWED,RWED,,)
- > ^ ^
- > Total of 1 file. | |
- > | |
- > Another user's name-- --- owner of the account
- >
- >~~~~~~~~~~~~~~
- >
- >I'm just wondering if there is a possiblity that the name of a group
- >can be the same as the name of a user. Or is there any way to check
- >the group name in VMS? like "ypcat group" in UNIX running NIS.
- >
-
- Well, the closest thing to it is to type, in AUTHORIZE:
-
- UAF> SHOW/ID S892999
-
- And it should display -- in UIC format -- the "owner" of that ID.
- I'd bet it will be [something,177777] (may be displayed as [something,*]).
-
- Here's a scenario how this comes about, in AUTHORIZE:
-
- 1. Create a user FOOBAR with UIC [123,456]. SHOW FOOBAR shows a UIC of
- [FOOBAR] ([123,456]).
-
- 2. Create a user FOOBAZ with UIC [123,654]. SHOW FOOBAZ shows a UIC of
- [FOOBAZ] ([123,654]).
-
- 3. Add a new identifier for the FOO group (ADD/ID FOO/VALUE=UIC=[123,*]).
-
- 4. SHOW FOOBAR and SHOW FOOBAZ again.
-
- FOOBAR's entry now reads [FOO,FOOBAR], and FOOBAZ's reads [FOO,FOOBAZ].
-
- You've just created the same kind of ID entry that you've mentioned above.
-
- One way around this: Delete the group entry, as others have indicated:
-
- UAF> REMOVE/ID [S892999,*]
-
- which only removes the group ID, S892999, not all of the IDs in that group.
-
- One way this can come about if someone once used SYS$EXAMPLES:ADDUSER.COM
- (or similar) and gave an account name that matched the username.
- ADDUSER uses the account name as the name of the group for the UIC. So if
- someone entered S892999 as a username and also as the "account name", you'd
- end up with a [S892999,*] ID added to the rightslist, and consequently all
- the user accounts will appear to be owned by [S892999,whomever].
-
- Hope this helps, even if it's a week late...
-
-
- John Francini
- PATHWORKS for VMS project leader
- Digital Equipment Corporation
- Littleton, MA
-
- francini@narfvx.enet.dec.com
-
-
-