libvirt before 2.0.0 improperly disables password checking when the password on a VNC server is set to an empty string, which allows remote attackers to bypass authentication and establish a VNC session by connecting to the server.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "1.3.5"
},
{
"introduced": "0"
},
{
"last_affected": "8.0"
}
]
}