mail/include.html in IceWarp Web Mail 5.5.1, as used by Merak Mail Server 8.3.0r and VisNetic Mail Server version 8.3.0 build 1, does not properly initialize the default_layout and layout_settings variables when an unrecognized HTTP_USER_AGENT string is provided, which allows remote attackers to access arbitrary files via a request with an unrecognized User Agent that also specifies the desired default_layout and layout_settings parameters.
marc.info/?l=full-disclosure&m=113570229524828&w=2
secunia.com/advisories/17046
secunia.com/advisories/17865
secunia.com/secunia_research/2005-62/advisory/
securityreason.com/securityalert/299
securitytracker.com/id?1015412
www.osvdb.org/22082
www.securityfocus.com/archive/1/420255/100/0/threaded
www.securityfocus.com/bid/16069
exchange.xforce.ibmcloud.com/vulnerabilities/23907