... | @@ -241,11 +241,12 @@ the memory layout of the process. Code reuse attacks, like ROP and its |
... | @@ -241,11 +241,12 @@ the memory layout of the process. Code reuse attacks, like ROP and its |
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variants, exist to bypass exploit mitigations like PAGEEXEC/NOEXEC.
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variants, exist to bypass exploit mitigations like PAGEEXEC/NOEXEC.
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Over the years, a lot of tooling for automated ROP gadget generation
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Over the years, a lot of tooling for automated ROP gadget generation
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has been developed. The tools generally rely on gadgets found via
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has been developed. The tools generally rely on gadgets found via
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shared libraries and require that those sshared libraries by loaded in
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shared libraries and require that those shared libraries be loaded in
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the same order. By randomizing the order in which shared librariers
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the same deterministic order. By randomizing the order in which shared
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get load, ROP gadgets have a higher chance of failing. Shared library
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librariers get load, ROP gadgets have a higher chance of failing.
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load order randomization is disabled by default, but can be opted in
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Shared library load order randomization is disabled by default, but
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on a per-application basis using secadm or hbsdcontrol.
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can be opted in on a per-application basis using secadm or
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hbsdcontrol.
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## PaX SEGVGUARD
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## PaX SEGVGUARD
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