Hacker publishes alleged zero-day exploit for Plesk

Security 1 Comment

According to KingCope, Plesk versions 9.5.4, 9.3, 9.2, 9.0 and 9.6 on three different Linux variants Red Hat, CentOS and Fedora are vulnerable to the hack. The exploit, as noted by the hacker, makes use of specially crafted HTTP queries that inject PHP commands. The exploit uses POST request to launch a PHP interpreter and the attacker can set any configuration parameters through the POST request. Once invoked, the interpreter can be used to execute arbitrary commands.

The exploit engineered by KingCope uses the requested URL to invoke the interpreter with the passed parameters and then the PHP code, residing in the data portion of the request, is executed. There is catch though – according to the hacker, the code only works where Plesk has been configured with the below configuration:

scriptAlias /phppath/ “/usr/bin/”

The access logs of server where the exploit is used would show the below entries:

POST /%70%68%70%70%61%74%68/%70%68%70?%2D%64+%61%6C%6C%6F%77%5F%75%72%6C%5F%69%6E%63%6C%75%64%65%3D%6F%6E+%2D%64+%73%61%66%65%5F%6D%6F%64%65%3D%6F%66%66+%2D%64+%73%75%68%6F%73%69%6E%2E%73%69%6D%75%6C%61%74%69%6F%6E%3D%6F%6E+%2D%64+%64%69%73%61%62%6C%65%5F%66%75%6E%63%74%69%6F%6E%73%3D%22%22+%2D%64+%6F%70%65%6E%5F%62%61%73%65%64%69%72%3D%6E%6F%6E%65+%2D%64+%61%75%74%6F%5F%70%72%65%70%65%6E%64%5F%66%69%6C%65%3D%70%68%70%3A%2F%2F%69%6E%70%75%74+%2D%6E HTTP/1.1″ 200 203 “-” “Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)


Ravi is the founder of Parity Media and currently acting as an editor of ParityNews.com. He is a technology enthusiast with keen interest in information security. Ravi has over 6 years of experience and is keen on raising general awareness about technology in society.

  • pelias

    hello, how can I know if my server has been afected with this xploit? someone send this. I installed apache with apt-get of ubuntu 12 in january.