Gentoo Linux Security Advisory GLSA 200804-19 – Toni Arnold, David Sveningsson, Michal Bartoszkiewicz, and Joseph reported that php-select does not quote parameters passed to the tr command, which could convert the -D PHP5 argument in the APACHE2_OPTS setting in the file /etc/conf.d/apache2 to lower case. Versions less than 1.0.1 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/65641/glsa-200804-19.txt
Source: https://packetstormsecurity.com/files/65641/Gentoo-Linux-Security-Advisory-200804-19.html