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-
- While looking in the /var/tmp directory I noticed a file called "outdata".
- After some experiments, I discovered that this file is written to by sam
- when the user selects "Networking and Communication" followed by
- "Internet Addresses" or "Network Information Service" (and probably others
- too).
-
- So, if I make a symbolic link from /var/tmp/outdata to
- /.rhosts (say), and wait for the sys-admin to run sam to configure
- networking, I can get a /.rhosts file. Admittedly this isn't too
- interesting as the file doesn't have the famous "+ +" in it. However,
- if your sysadmin happens to have umask set to 0 then you've now got a
- world writable /.rhosts file. (This isn't as unusual as it sounds, try an
- rlogin to a remote host running HP-UX and check your umask. Chances are
- it's 00).
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-
-
- You've certainly got a case for a very potent DoS. Link to any file you want:
- /bin/sh, /etc/passwd, /bin/login, etc. and *poof* there it goes.
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