Multiple stack-based buffer overflows in unspecified CGI programs in the Unified Maintenance Tool web interface in the embedded web server in the Communication Server (CS) in Alcatel-Lucent OmniPCX Enterprise before R9.0 H1.301.50 allow remote attackers to execute arbitrary code via crafted HTTP headers.
The Communication Server in Alcatel-Lucent OmniPCX Enterprise 7.1 and earlier caches an IP address during a TFTP request from an IP Touch phone, and uses this IP address as the destination for all subsequent VoIP packets to this phone, which allows remote attackers to cause a denial of service (loss of audio) or intercept voice communications via a crafted TFTP request containing the phone's MAC address in the filename.
Alcatel-Lucent IP-Touch Telephone running OmniPCX Enterprise 7.0 and later enables the mini switch by default, which allows attackers to gain access to the voice VLAN via daisy-chained systems.
The Session Initiation Protocol (SIP) implementation in Alcatel OmniPCX Enterprise 5.0 Lx allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted INVITE messages, as demonstrated by the OUSPG PROTOS c07-sip test suite.
Alcatel OmniPCX 4400 installs known user accounts and passwords in the /etc/password file by default, which allows remote attackers to gain unauthorized access.