Argument injection vulnerability in scponlyc in scponly 4.1 and earlier, when both scp and rsync compatibility are enabled, allows local users to execute arbitrary applications via "getopt" style argument specifications, which are not filtered.
https://exchange.xforce.ibmcloud.com/vulnerabilities/23875
http://www.securityfocus.com/bid/16051
http://www.gentoo.org/security/en/glsa/glsa-200512-17.xml
http://sublimation.org/scponly/#relnotes