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On 01/23/2012 12:12 PM, Francesco Riosa wrote: |
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> 2012/1/23 Mike Gilbert <floppym@g.o>: |
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>> On Mon, Jan 23, 2012 at 2:57 PM, Jason A. Donenfeld <Jason@×××××.com> wrote: |
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>>> To check for PIE, |
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>>> |
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>>> readelf -h /bin/su | grep Type |
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>>> |
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>>> If it says EXEC, no PIE. If it says DYN, yes PIE. |
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>> |
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>> I'm asking "how does one enable PIE/ASLR", not how to check if it is |
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>> enabled already. |
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> |
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> - PIE should be -fPIC also for the executable, not only for the .so |
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> (has a performance impact) |
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> - ASLR you need "hardened" use for gcc, and the toolchain, pax kernel help too |
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> |
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> xattr could be used to reduce the number of suid binaries, but need |
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> support in portage |
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|
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We've got experimental support for FEATURES=xattr since |
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portage-2.2.0_alpha80. We can include that in the next portage-2.1.x |
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release. |
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-- |
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Thanks, |
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Zac |
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