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Bugtraq: Buggy /usr/bin shell scripts

Buggy /usr/bin shell scripts

From: <obi_at_VIC20.DZP.SE>
Date: Sat, 6 Dec 1997 13:31:01 +0100

This is old news, but it seem to be around still.

Solaris 2.5.1 and 2.6:

$ ln -s /usr/bin/true /tmp/e
$ PATH=/tmp IFS=x /usr/bin/false
$ echo $?
0

This combined with the habit of giving non-login accounts /bin/false
as a shell feels dangerous.

Credits to Wilhelm Mueller for bringing it up in gnu.bash.bug in the
sense of a security related bug.
Received on Dec 06 1997

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