Wouldn't count those shell chickens - awk alone is enough and we can use ssh and openssl clients (all in metasploit public code). As one of the people who makes novel shell types, I can assure you that this effort is only going to slow skiddies and only until the rest of us publish mitigations for this mitigation :)
-Boris (RageLtMan)
-Boris (RageLtMan)
On July 16, 2024 12:12:49 PM EDT, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote:
On Tue, 2024-07-16 at 17:57 +0200, Roberto Sassu wrote:But the Clip OS 4 patch does not cover the redirection case:
# ./bash < /root/test.sh
Hello World
Do you have a more recent patch for that?
How far down the rabbit hole do you want to go? You can't forbid a
shell from executing commands from stdin because logging in then won't
work. It may be possible to allow from a tty backed file and not from
a file backed one, but you still have the problem of the attacker
manually typing in the script.
The saving grace for this for shells is that they pretty much do
nothing on their own (unlike python) so you can still measure all the
executables they call out to, which provides reasonable safety.
James
