Re: mounting filesystems with "noexec"
From: Eli Dart (dart_at_es.net)
Date: Fri, 23 Sep 2005 15:59:13 -0700 To: firstname.lastname@example.org
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randall s. ehren wrote:
>> With all that has been said so far, what is the actual point of
>> the noexec flag?
> it prevents executables from being executed on a specific partition.
> for instance, you can mount /var with the noexec flag and if you then
> try to run any binaries (executables) from /var they simply will not
Note that while there may be many ways to circumvent noexec in many
circumstances, it still raises the bar. If attempts to execute on a
filesystem mounted noexec can be logged (and the logs are sent off-box)
you have a chance of seeing something. Also, if the execution is part
of an automated tool, noexec can cause the tool to fail.
It may not be perfect, but I don't consider it useless.
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