On Gentoo, the file /etc/nullmailer/remotes is installed with wrong 
permissions:

~ # ls -la /etc/nullmailer/remotes 
-rw-r--r-- 1 root root 971 Aug  9 18:58 /etc/nullmailer/remotes

Nullmailer-1.11-r2 contains the fix, all prior versions are affected.

Please assign a CVE.
-- 
Agostino Sarubbo
Gentoo Linux Developer