Gentoo Linux Security Advisory GLSA 200506-02 – When GNU Mailutils is built with the mysql or postgres USE flag, the sql_escape_string function of the authentication module fails to properly escape the character, rendering it vulnerable to a SQL command injection. Versions less than 0.6-r1 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/38116/glsa-200506-02.txt
Source: https://packetstormsecurity.com/files/38116/Gentoo-Linux-Security-Advisory-200506-2.html