0
votes
1answer
455 views

Stack Guard vs Stack Shield

I would like to know why nowadays Stack Guard is used everywhere (example: ProPolice in GCC, /GS in Visual Studio), instead of Stack Shield. Both the approaches (i.e. Stack Guard & Stack Shield) ...
7
votes
1answer
419 views

How does ASCII-Armoring help to prevent buffer-overflow attacks?

I was reading about return-to-libc attacks at Wikipedia. According to what I read and understood from the article, ASCII armoring means that binary data is converted into ASCII values by grouping ...
1
vote
1answer
74 views

How non-executable are implemented? [duplicate]

In the "Hacking the art of Exploitation" its said that the basic idea of stack overflows attacks is that the operating system can't differentiate instructions from data inside the stack ,and the ...
1
vote
1answer
57 views

Dangers of a vulnerability in a local installer?

I sent a message to my dev manager about a buffer overflow in our (widely distributed) installer, and received a response that it didn't matter as it wasn't server code. Other than the fact that if ...
12
votes
3answers
1k views

Bypassing Address Space Layout Randomization

How effective is ASLR in preventing arbitrary code execution in a buffer overflow type exploit? How hard is it for an attacker to bypass this without simply guessing where the addresses are?