Multiple CRLF injection vulnerabilities in webadmin in ZNC before 0.066 allow remote authenticated users to modify the znc.conf configuration file and gain privileges via CRLF sequences in the quit message and other vectors.
http://znc.svn.sourceforge.net/viewvc/znc?view=rev&sortby=rev&sortdir=down&revision=1396
http://znc.svn.sourceforge.net/viewvc/znc?view=rev&sortby=rev&sortdir=down&revision=1395
http://www.openwall.com/lists/oss-security/2009/03/01/2
http://www.debian.org/security/2009/dsa-1735