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3
votes
2answers
142 views

Heartbleed and heap management - Why user data and passwords are kept in memory?

If I understand correctly the hearbleed vulnerability, only the heap of the OpenSSL process can be retrieved by an attacker (or part of depending on the memory allocation type that is used). Then, how ...
0
votes
2answers
64 views

What is the heapspray technique and how to use it as reliably as possible?

Can somebody explain the different steps to produce a heapspray attack (what are the needed vulnerabilities in the targeted software, what are the limitations of such technique, how to proceed, ...) ...
3
votes
3answers
341 views

Are stack & heap overflow exploits no longer effective?

Do all new OSes implement the no execute bit in order to overcome vulnerabilities that could be used to execute malicious code? for example, is it implemented in Win7? Does that mean that the ...
1
vote
1answer
280 views

Determining the target address in a heap overflow

For a heap overflow to occur and arbitrary code to be executed, the function free() performs the step : hdr->next->next->prev = hdr->next->prev I understand that the address of ...