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https://github.com/rapid7/metasploit-payloads
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82e64ff406
In posix, a command like "echo 'foo bar'" would previously get parsed
out into arguments for execve like [ "echo", "'foo", "bar'" ] which
obviously isn't what you want. After this commit, it sticks the whole
thing in an arg to sh so the execve call ends up looking like
execve("/bin/sh", ["sh", "-c", "echo 'foo bar'"], [/* 26 vars */]) = 0
This is still a little less than ideal because shell escapes become a
problem; fortunately, that's easy to deal with on the client side as
long as module developers take it into account.