Messages in this thread | | | Subject | Re: Unexecutable stack | Date | Tue, 28 Dec 1999 16:38:57 -0300 | From | Horst von Brand <> |
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Steve VanDevender <stevev@efn.org> said:
[...]
> In theory it is possible to write executable code into a buffer > in the data segment and overflow a buffer in the stack so that > the stack frame contains a return address that points into that > data. In practice it is much harder to create an exploit with > this method as it requires quite detailed knowledge of the data > segment layout.
Yep, it is somewhat harder, and thus not done regularly by crackers today, as this is rarely needed now. If/when this becomes common, the cracks will become common too. Then we are where we started. Better than buying (false) security is to fix the affected programs. -- Dr. Horst H. von Brand mailto:vonbrand@inf.utfsm.cl Departamento de Informatica Fono: +56 32 654431 Universidad Tecnica Federico Santa Maria +56 32 654239 Casilla 110-V, Valparaiso, Chile Fax: +56 32 797513
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