Alfredo Ortega found a flaw in how Vinagre uses format strings.
A remote attacker could exploit this vulnerability if they were able to
trick a user into connecting to a malicious VNC server, or opening a
specially crafted URI with Vinagre. With older versions of Vinagre,
it was possible to execute arbitrary code with user privileges.
In later versions, Vinagre would abort, leading to a denial of service.