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-
- Release 2.1 of the Universal NFS server fixes a couple of security
- problems that existed in version 2.0 and probably earlier versions.
-
- It does the following things:
-
- * authenticate fh's on every request. Support for it was
- there, but didn't work. This resulted in a particularly
- nasty hole that allows anyone to mount your entire
- file system and view all files (wave your /etc/shadow
- bye bye :->). I have written a sample program that
- demonstrates this hole and will release it at a later
- date.
-
- Authentication code is not yet optimized. Especially
- for sites that have wildcard names in their /etc/exports,
- this may cause performance problems. I'll be working
- on a revamped authenitcation code that does this faster.
-
- * Use setfsuid/setfsgid for setting owner/group on file
- access rather than seteuid. With the old seteuid method,
- any user on the system could kill the server.
-
- The setfsuid/setfsgid functions were not implemented
- in libc-4.6.27, so I added a small assembler file
- that implements them. libc-4.6.29 seems to have them,
- though.
-
- * Implement root_squash and no_root_squash mount options.
-
-
- Olaf Kirch <okir@monad.swb.de>
- 12 March 1995
-