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Bug#: 122376
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Status: RESOLVED
Resolution: DUPLICATE of bug 125902
Assigned To: Gentoo Security <security@gentoo.org>
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Reporter: Tavis Ormandy (RETIRED) <taviso@gentoo.org>
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Bug 122376 depends on: Show dependency tree
Bug 122376 blocks:

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Description:   Opened: 2006-02-10 07:55 0000 
As gentoo doesnt follow the standard of setting games to setgid a low
privileged group, any user in group games can create symlinks in
/var/games/nethack/save, allowing them to trick other users to overwriting or
creating files.

reproduce:

cd /var/games/nethack/save
ln -s /any/file/victim/owns <uid><username>.bz2

now get victim to run nethack, when they save their game target file will be
overwritten or created.

This only affects gentoo, and is not a bug in nethack.

------- Comment #1 From Chris Gianelloni (RETIRED) 2006-02-10 12:13:09 0000 ------- 
See, this is not *at all* what you explained to me this morning.  Had you used
*this* example, you would have convinced me that *something* needs to be done
to resolve this.  I'm still not convinced that setgid is the answer, but
something should be done. =]

------- Comment #2 From Thierry Carrez (RETIRED) 2006-02-11 14:01:26 0000 ------- 
Games team, please advise

------- Comment #3 From Thierry Carrez (RETIRED) 2006-02-21 09:50:17 0000 ------- 
Late.

------- Comment #4 From Thierry Carrez (RETIRED) 2006-03-12 03:41:49 0000 ------- 
Regrouping nethack / group games issues.

*** This bug has been marked as a duplicate of 125902 ***
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