I just published a blog post on how to get the oracle database link password if for some reason we have forgotten it.Brian Fitzgerald respond to me with :
@Hatem__Mahmoud if you can trace listener across fork, you can get anyone’s password
— Brian Fitzgerald (@ExaGridDba) November 16, 2016
Indeed this is a very good point ! And here is how we can do that using GDB :
What to do in case we forgot the database link password and we need it ? Are we stuck ? In this short blog post i will show a way to recover the password ! For that we are going to use the pin tools described on my previous post for tracing memory references and the debugger GDB.
This blog post is motivated by a conversation with Frits Hoogland on his great blog post The curious case of the missing semctl call about how he managed to find a useful memory address (suspecting a fixed SGA variable) used by a process in his investigation.So here i will show how we can easily generates a trace of all/range of memory addresses referenced by a program with an acceptable overhead.
Hatem Mahmoud's blog 