The 'unless' statement expects there's always a value for USERNAME
and PASSWORD. We might as well just set '' as the default value
to avoid the NoMethodError mistake. Related to bug #7140.
Unfortunately, adds a dep on bionic for runtime compilation.
Gets ring0, sets the (res)uid to 0 and jumps to the payload. Still some
payload issues because linux stagers don't mprotect(2) the buffer they
read(2) into. Single payloads work fine, though.
Also cleans up and improves local exploits' ability to compile C.
[SEERM #3038]
This is a fix for issues related to:
'undefined method `[]' for nil:NilClass'
It is possible that a PDF may not have the 'Size' xref, and people
are running into the 'undefined method'[]' for NilClass' exception.
Because the pdf parser always assumes there is a Size field,
so it uses a match() function to find the value for Size, which
can be nil.
See the following bug report for example:
https://dev.metasploit.com/redmine/issues/7014
Something is still broken, my socket() is returning EAFNOSUPPORT whereas
what looks like the same syscall in wunderbar_emporium's exploit.c is
returning a socket. Similarly, my __mmap2() is returning EFAULT when
trying to map anything, not just NULL.
This can currently build an executable that creates a socket, opens a
temporary file, truncates that file with ftruncate(2) and calls
sendfile. Still needs to mmap NULL and figure out ring0 shellcode.
Baby steps.
This also fixes an issue with report_vuln() from exploited hosts not
setting the service correctly. This introduces a fail_reason method
to the exploit base class, which attempts to determine why an exploit
did not work (closed port, unreachable host, missing page, etc). There
is still quite a bit of work to do around this to finish it up.
jvazquez-r7