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On 12/22/2012 05:58 PM, Maxim Kammerer wrote: |
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> Hi Anthony, |
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> |
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> Is user.* xattrs on tmpfs considered safe now? (Referring to |
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> meeting-2012-11-14_20_00UTC.log.) |
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> |
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> As a side note, why does XATTR_PAX use user.* and not security.* namespace? |
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> |
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|
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An updated patch by pipacs limits tmpfs to just user.pax.* namespace, |
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and even then there is a size limit. The size check is critical and |
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what was originally missing. |
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|
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XATTR_PAX uses user.* so that a non-privileged user can set flags on |
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their own ELF objects as they can with PT_PAX. Primarily the concern is |
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on processes running as root. There PaX hedges against escalation. |
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There is no danger of escalation when it comes to processes that below |
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to a low privileged user. |
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|
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-- |
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Anthony G. Basile, Ph. D. |
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Chair of Information Technology |
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D'Youville College |
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Buffalo, NY 14201 |
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(716) 829-8197 |
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