OOB read allows an attacker to measure internal status such as stack status, and memory allocator status, this widget along with another flaw makes exploits muc

OOB read allows an attacker to measure internal status such as stack status, and memory allocator status, this widget along with another flaw makes exploits much more reliable. You -can- definitely do bad things with the data gained from it. For the memory allocator data, read up on the "house of" attacks against glibc's allocator.