Stack-based buffer overflow in the SFTP subsystem in GoodTech SSH 6.4 allows remote authenticated users to execute arbitrary code via a long string to the (1) open (aka SSH_FXP_OPEN), (2) unlink, (3) opendir, and other unspecified parameters.
https://www.exploit-db.com/exploits/6804
https://exchange.xforce.ibmcloud.com/vulnerabilities/46038
http://www.vupen.com/english/advisories/2008/2895
http://www.securityfocus.com/archive/1/497745/100/0/threaded