Ubuntu Security Notice 615-1 – Alin Rad Pop of Secunia Research discovered that Evolution did not properly validate timezone data when processing iCalendar attachments. If a user disabled the ITip Formatter plugin and viewed a crafted iCalendar attachment, an attacker could cause a denial of service or possibly execute code with user privileges. Note that the ITip Formatter plugin is enabled by default in Ubuntu. Alin Rad Pop of Secunia Research discovered that Evolution did not properly validate the DESCRIPTION field when processing iCalendar attachments. If a user were tricked into accepting a crafted iCalendar attachment and replied to it from the calendar window, an attacker code cause a denial of service or execute code with user privileges. Matej Cepl discovered that Evolution did not properly validate date fields when processing iCalendar attachments. If a user disabled the ITip Formatter plugin and viewed a crafted iCalendar attachment, an attacker could cause a denial of service. Note that the ITip Formatter plugin is enabled by default in Ubuntu.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/67075/USN-615-1.txt
Source: https://packetstormsecurity.com/files/67075/Ubuntu-Security-Notice-615-1.html