Ssh tunnel : permission denied

Not sure if this is same issue

Seems related to SMACK issue, you can give a try by adding:
iptables -I INPUT -j ACCEPT
xattr set ‘security.SMACK64’ ‘app.myapp’ /usr/bin/ssh

maybe you also need to change for security.SMACK64EXEC,security.SMACK64IPIN or security.SMACK64IPOUT