The e_hostname function in commands.c in BitchX 1.1a allows local users to overwrite arbitrary files via a symlink attack on temporary files when using the (1) HOSTNAME or (2) IRCHOST command.
https://exchange.xforce.ibmcloud.com/vulnerabilities/38262
http://www.vupen.com/english/advisories/2007/3714
http://www.securityfocus.com/bid/26326
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.285737
http://security.gentoo.org/glsa/glsa-200807-12.xml
http://secunia.com/advisories/34870
http://secunia.com/advisories/31180