Format string vulnerability on the Research in Motion BlackBerry 7270 before 4.0 SP1 Bundle 108 allows remote attackers to cause a denial o…

Format string vulnerability on the Research in Motion BlackBerry 7270 before 4.0 SP1 Bundle 108 allows remote attackers to cause a denial of service (blocked call reception and calling) via format string specifiers in an SIP INVITE message that lacks a host name in the Contact header.