gix-transport crate prior to the patched version 0.36.1 would allow attackers to use malicious ssh clone URLs to pass arbitrary arguments to the
ssh program, leading to arbitrary code execution.
gix clone 'ssh://-oProxyCommand=open$IFS-aCalculator/foo'
This will launch a calculator on OSX.
See https://secure.phabricator.com/T12961 for more details on similar vulnerabilities in