I followed the steps on "Code Injection into Running Linux Application" but it fails and I can not fix it!

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I have done the same thing I have 1 application A that just prints a one liner each 7 seconds and another code that has a function with another print, injection.o. When I get to the step to open my object file injection.o and trying to map it in the memory I get several errors.

When I first do "call open("injection.o", 2)" it always return -1. I then did "call open("injection.o", "O_RDWR")". Then it returned a fd = 3.

When I then do mmap(1, 2504, 1|2|4, 1, 3, 0), 2504 is my objects file size, it again only returned -1.

I have no clue on what to do. Can anyone help me?

Br

Hung

Posted 6-Mar-14 2:25am

Member 10645548

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OriginalGriff · Answer 1 · 2014-03-06T02:42:00

Don't post this under Quick Answers - if you got the code from an article - this one perhaps: Code Injection into Running Linux Application[^] - then there is a "new message" button at the bottom of that article, which causes an email to be sent to the author. They are then alerted that you wish to speak to them.
Posting this here relies on them "dropping by" and realising it is for them.