Gentoo Linux Security Advisory GLSA 200805-03 – Bernhard R. Link discovered that Eterm opens a terminal on :0 if the -display option is not specified and the DISPLAY environment variable is not set. Further research by the Gentoo Security Team has shown that aterm, Mrxvt, multi-aterm, RXVT, rxvt-unicode, and wterm are also affected. Versions less than 1.0.1-r1 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/66110/glsa-200805-03.txt
Source: https://packetstormsecurity.com/files/66110/Gentoo-Linux-Security-Advisory-200805-3.html