An error in zone database reference counting can lead to an assertion failure if a server which is running an affected version of BIND attempts several transfers of a slave zone in quick succession. This defect could be deliberately exercised by an attacker who is permitted to cause a vulnerable server to initiate zone transfers (for example: by sending valid NOTIFY messages), causing the named process to exit after failing the assertion test. Affects BIND 9.12.0 and 9.12.1.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "9.12.0"
},
{
"introduced": "0"
},
{
"last_affected": "9.12.1"
}
]
}