December 2017
Intermediate to advanced
860 pages
16h 1m
English
Content preview from Metasploit Revealed: Secrets of the Expert Pentester
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Implementing a check method for exploits in Metasploit
It is possible in Metasploit to check for the vulnerable version before exploiting the vulnerable application. This is very important, since if the version of the application running at the target is not vulnerable, it may crash the application and the possibility of exploiting the target becomes nil. Let us write an example check code for the application we exploited in the previous section as follows:
def check c = connect_login disconnect if c and banner =~ /220 PCMan's FTP Server 2\.0/ vprint_status("Able to authenticate, and banner shows the vulnerable version") return Exploit::CheckCode::Appears elsif not c and banner =~ /220 PCMan's FTP Server 2\.0/ vprint_status("Unable to authenticate, ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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