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How to check if noexec_user_stack is enabled

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Question: How can I check is noexec_user_stack is enabled on a Solaris 7-10?

Answer:

 # echo noexec_user_stack/D | mdb -k

Notes:

http://download.oracle.com/docs/cd/E19683-01/816-7137/chapter2-26/index.html

"noexec_user_stack

Description

Enables the stack to be marked as non-executable. This helps in making buffer-overflow attacks more difficult.

A Solaris system running a 64-bit kernel makes the stacks of all 64-bit applications non-executable by default. Setting this variable is necessary to make 32-bit applications non-executable on systems running 64-bit or 32-bit kernels.

Note This variable exists on all systems running the Solaris 2.6, 7, 8, or 9 releases, but it is only effective on sun4u and sun4m architectures."


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Page last modified on July 15, 2011, at 08:19 AM EST