source: https://www.securityfocus.com/bid/33962/info cURL/libcURL is prone to a security-bypass vulnerability. Remote attackers can exploit this issue to bypass certain security restrictions and carry out various attacks. This issue affects cURL/libcURL 5.11 through 7.19.3. Other versions may also be vulnerable. The following example redirection request may be used to carry out this attack: Location: scp://name:passwd@host/a'``;date >/tmp/test``;'