what you don't know can hurt you
PHP LiteSpeed suEXEC_Daemon Secret Disclosure
Posted Jan 25, 2016
Authored by Imre Rad

In suEXEC_Daemon mode of the LiteSpeed web server spawns one PHP master process during startup. It is running as root and accepts LSAPI requests, which in turn specify what user under the script should run. The LSAPI request is authenticated with a MAC, which is based on pre-shared random key between the the PHP and the web server. The researchers found that the Litespeed PHP SAPI module did not clear this secret in its child processes so it was available in the PHP process memory space of the child processes. The fixed versions of PHP are 5.5.31, 5.6.17, and 7.0.2.

tags | advisory, web, root, php, info disclosure
MD5 | d25313bc2ac96b7c25905a3525cc4e8e

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